Automatic Transaxle - 4t65-e - Overhaul Buick LaCrosse I

Fastener Tightening Specifications

Fastener Tightening Specifications

End Play Specifications

End Play Specifications

Transfer Case Selective Washer Specifications

Transfer Case Selective Washer Specifications

Transmission General Specifications

Transmission General Specifications

Fluid Capacity Specifications

Fluid Capacity Specifications

Model Build Information (MN7)

Model Build Information (RPO MN7)

Model Build Information (M15)

Model Build Information (RPO M15)

Model Build Information (M76)

Model Build Information (RPO M76)

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Scheme 125

Torque Converter Assembly Removal

1. Remove the torque converter assembly (1).
2. Remove the turbine shaft O-ring seal (520).

Tools Required

1. J 3289-20 Holding Fixture Base
2. J 28664-B Transmission Holding Fixture. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. J44465 Holding Fixture Adapter. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

Procedure

1. Install J44465 onto J 28664-B . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. Install J 28664-B onto the transmission. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. Install the transmission and holding fixture into J 3289-20 .
4. Insert the pin into J 3289-20 in order to hold the transmission in the desired position.

1. J 6125-1B Slide Hammer
2. J 44467 Output Shaft Assembly Remover and Installer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. J 44755 Holding Fixture

Removal Procedure

1. Remove the drive shaft retaining ring (509).
2. Rotate the transaxle 90 degrees.
3. Remove the transfer case lower brace bolt (904).
4. Rotate the transaxle 90 degrees.
5. Remove the transfer case side brace bolts (903). Remove the side brace (905).
6. Remove the transfer case to case bolts (907, 909, 910).
7. Remove the transfer case assembly (908) from the transmission case (3).
8. Remove the transfer case lower brace bolts (903).
9. Remove the transfer case lower brace (906).
10. Remove the case extension seal (8) from the transfer case (908).
11. Position the transaxle so that the case side cover is facing down.
12. Remove the oil dam (901) from the transaxle.
13. Install the transfer case assembly onto the J 44755 . Position the carrier onto the post of the fixture.
14. Install the retaining bolts. Tighten: Tighten the retaining bolts to 50 N.m (37 lb ft).
15. Attach the J 6125-1B to J 44467 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Install the J 44467 into the snap ring groove on the output shaft (510). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Tighten J 44467 securely to the output shaft. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
16. Remove the output shaft with the slide hammer impact.
17. Remove the final drive sun gear (697).
18. Remove the selective washer (902).
19. Remove the parking gear (696) and the parking gear thrust bearing (695).
20. Remove the final drive sun gear shaft (689).

1. Use a long screwdriver in order to depress the reverse band servo cover (40) by prying against the transmission holding fixture.
2. Use a small screwdriver in order to pry out the retaining ring (39) from the reverse band servo cover.
3. Remove the long screwdriver. The servo assembly will push the servo cover (40) up.
4. Remove the servo cover (40) and the servo cover O-ring seal (41).
5. Remove the reverse band servo assembly (42-48).
6. Remove the reverse band servo piston spring (49).

1. Position the transmission so that the oil pan is facing up.
2. Use a long screwdriver in order to compress the forward band servo assembly cover (13) by prying against the work bench.
3. Hold the servo assembly compressed.
4. Remove the three forward band servo cover bolts (12).
5. Remove the long screwdriver. The servo assembly will push the servo cover out. If the servo cover does not push out, tap it with a rubber mallet.
6. Remove the servo cover (13) and remove the cover seal (14).
7. Remove the servo assembly (15-21).
8. Remove the piston spring (22) from the forward band servo.

1. Remove the 20 oil pan bolts (23).
2. Remove the oil pan (24).
3. Remove the oil pan gasket (25).
4. Use a screwdriver in order to pry the oil filter assembly (100) out of the case. Do not damage the case sealing surface.
5. Use a small screwdriver in order to pry the oil filter seal assembly (101) out of the case. Do not damage the case sealing surface.

Inspection Procedure

1. Inspect the oil pan magnet (26) for steel particles. Excessive amounts of steel shavings indicate internal transmission damage.
2. Use a screwdriver or side cutters in order to open the oil filter assembly (100), by cutting or prying the metal crimping away from the top of the filter and by pulling the filter apart.
3. Inspect the filter (100) for excessive amounts of the following: Clutch plate assembly fiber material, indicating clutch distress Bronze slivers, indicating bushing wear Steel particles, indicating internal transmission damage

1. Remove the four indicated accumulator cover bolts (131) from the 1-2 and 2-3 accumulator cover (132).
2. Remove the three indicated bolts (103) from the manual 2-1 band servo cover (104).
3. Use a large screwdriver in order to gently pry the lube oil pipe retainer (129) from the case.
4. Remove the lube oil pipe (130) from the front differential carrier internal gear lube hole.
5. Remove the 1-2 and 2-3 accumulator assembly (132-140), the pipe assembly (124-126) and the manual 2-1 band servo cover (104).
6. Remove the manual 2-1 band servo assembly (106-116) out of the case at the same time.
7. Remove the cover seal (105) from the manual 2-1 band servo assembly.

Disassembly Procedure

1. Position the transaxle so that the control valve body cover (53) is facing up.
2. Remove the 17 control valve body cover bolts: 9 flanged bolts (56) 4 TORX bolts (57) 4 stud bolts (58)
3. Remove the cover (53), outer gasket (54) and inner gasket (59).

1. Using a small screwdriver, pry the wiring harness (224/225) electrical connectors off of the following components: Automatic transaxle fluid pressure manual valve position switch assembly (395) 1-2, 3-4 Shift solenoid valve assembly (315A) 2-3 Shift solenoid valve assembly (315B) TCC PWM solenoid valve assembly (334) Pressure control solenoid valve assembly (322) Automatic transaxle input speed sensor assembly (440) IMS (811)
2. Gently pull the automatic transaxle fluid temperature sensor (391) from it's clip.
3. Lift the wiring harness assembly (225) off of the transaxle.

1. Remove the eleven indicated oil pump bolts (230, 231).
2. Do not remove the one oil pump cover bolt (205) at this time.
3. Remove the one wiring harness clip (390).
4. Lift the oil pump assembly (200) off of the control valve body (300).
5. Set the oil pump assembly (200) on its cover.

1. Remove the indicated control valve body bolts (374-381, 384).
2. Carefully lift the fluid pressure manual valve position switch assembly (395) off of the control valve body (300). Handle the switch assembly carefully, it is very delicate.
3. Remove the control valve body assembly (300).
4. Remove the two retainers (368) from the valve body assembly.
5. Remove the spacer plate and gasket assembly (396) and discard with the two screen/seal assemblies (382) from the valve body (300). Remove the six ball check valves (372, 373) from the valve body (300). Remove the case cover pin (410).
6. Remove the four ball check valves (372) from the case cover (400).

Scheme 126

Remove the oil pump drive shaft assembly (227) from the case cover (400).

1. Position the transmission so that the vehicle speed sensor (10) is facing up.
2. Remove the vehicle speed sensor bolt (9).
3. Remove the vehicle speed sensor (10).

J 42562 Axle Removal Wedge. See Special Tools .

1. Remove the four case extension bolts (5).
2. Remove the case extension assembly (6) and remove the extension seal (8).
3. Leave the differential carrier thrust washer (714) and the bearing (715) on the carrier.
4. Rotate the differential carrier until the end of the output shaft can be seen and the differential pinion shaft (701) is in a horizontal position.
5. Place the J 42562 Axle Removal Wedge between the end of the output shaft and the differential pinion shaft. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
6. Using a hammer, hit the end of the axle removal tool in order to compress the output shaft compression ring (509) and push the output shaft through the differential side gear.
7. Remove the differential carrier assembly (700).
8. Using snap ring pliers remove the compression ring (509) from the output shaft.
9. Pull the output shaft (510) out of the transmission.

1. J 8001 Dial Indicator Set
2. J 25025-8 Dial Indicator Mounting Post. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. J 26958-10A Adapter Plug
4. J 28585 Snap Ring Remover

1. If the final drive assembly (700) has been removed it must be reinstalled.
2. Make sure that the thrust washer (714) and the bearing (715) are still on the differential carrier.
3. Install the case extension seal (8) onto the case extension (6).
4. Install the case extension assembly (6) onto the transmission case.
5. Install only two of the four case extension bolts (5). Tighten: Do not torque the bolts. Tighten them only until the case extension is fully seated.
6. Position the transmission so that the case extension is facing upward.
7. Install J 25025-8 , J 26958-10A and J 8001 .
8. Set the dial indicator to zero.
9. Use J 28585 or a large screwdriver in order to lift the differential carrier. Pry up on the vehicle speed sensor reluctor wheel through the sensor hole in the case extension.
10. Note the dial indicator reading before changing the carrier thrust washer (714). If the dial indicator reading is less than 0.12 mm (0.005 in), install the next smaller size thrust washer, then recheck. If the dial indicator reading is greater than 0.62 mm (0.025 in), install the next larger size thrust washer, then recheck. If the dial indicator reading is 0.12-0.62 mm (0.005-0.025 in), the thrust washer is correct. Refer to the Differential Carrier/Case Thrust Washer (714) Selection Guide in «End Play Specifications»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__end-play-specifications) .
11. Remove J 8001 , J 25025-8 and J 26958-10A . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Remove the manual shift detent bolt (805).
2. Remove the manual shift detent assembly (804).
3. Compress the manual valve link spring (403) from the manual valve (404).
4. Lift the manual valve link (402) off of the manual valve (404).
5. Position the manual valve link (402) so that the valve will not interfere with the case cover removal.
6. Remove the oil dam (27) from the case.
7. Using a small screwdriver, pry the input speed sensor clip (441) out of the case cover (400).
8. Carefully pull the input speed sensor (440) out of the case cover (400).

1. J 23129 Seal Remover
2. J 6125-1B Slide Hammer

Scheme 127

Use J 23129 and J 6125-1B in order to remove the axle oil seal assembly (409) from the case cover (401).

J44538 Torx® 30+. See Special Tools .

1. Remove the indicated case cover bolts (434-436).
2. Use J44538 to remove case cover bolt (433). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. Lift the case cover assembly (400) off of the case.
4. Remove the thrust washer (432).
5. Remove the upper (430) and the lower (429) case cover gaskets.

1. Remove the fourth clutch fiber and steel plates (501, 502) or (529, 530),some models.
2. Remove the fourth clutch apply plate (528).
3. Remove the fourth clutch shaft assembly (504).
4. Remove the drive link lube scoop (608).

Checking Procedure

1. Make sure that the driven sprocket support (609) and both sprockets (506, 516) are fully seated.
2. Pull the drive link assembly (507) toward the case at the indicated location.
3. Measure the distance between the case and the drive link assembly (507): If the measurement is 3.2 mm (1/8 in) or greater, reuse the drive link assembly (507). If the measurement is less than 3.2 mm (1/8 in), replace the drive link assembly (507).

1. Remove the fourth clutch shaft thrust washer (505).
2. Remove the drive sprocket thrust washer (514). It may be stuck to the case cover
3. Remove the speed sensor reluctor wheel (527).
4. Note the location of the master link on the drive link assembly (507). It is the one link that is a different color than the rest. It may be facing up or down towards the case. The drive link assembly (507) must be in the same position during assembly.
5. Lift the drive and driven sprockets (516, 506) with the drive link assembly (507) out of the case. Lift both sides evenly It may be necessary to tap the turbine shaft (518) up gently with a rubber mallet
6. Remove the drive and driven sprocket thrust washers (517, 508). They may be stuck to the sprockets

1. With your fingers, insert two 13 mm channel plate bolts (434) into the driven sprocket support assembly (609).
2. Grasp the bolts and lift the support assembly from the case.
3. Remove the thrust washer (611) from the second clutch housing. The washer may be stuck to the support assembly.

Tool Required

J 33381-A Clutch Assembly Remover/Installer. See Special Tools .

1. Adjust the collar on tool J 33381-A to the 4T65-E CLUTCH & DRUM setting. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Make sure that the threaded rod is fully loosened.
2. Install J 33381-A into the second clutch housing assembly (617). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. Tighten the threaded rod of J 33381-A until the rod is finger tight. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
4. Lift up J 33381-A with the second clutch housing (617) and the input clutch housing (632) attached. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . The sprag clutch assemblies will also be attached.
5. Place the complete assembly on the bench.
6. Loosen the threaded rod of J 33381-A . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
7. Remove J 33381-A from the assembly. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
8. Lift the second clutch housing (617) off of the input clutch housing.
9. Remove the input clutch housing thrust bearing (629) from the input housing.
10. Remove the selective thrush washer (630) from the input clutch housing (632).

Scheme 128

Tilt the band in order to disengage the band from the anchor pin in the case. Remove the reverse band assembly (615).

Scheme 129

Remove the reverse reaction drum (669).

1. Remove the two case extension bolts (5).
2. Remove the case extension assembly (6) and remove the seal (8).
3. Remove the differential carrier thrust washer (715).
4. Remove the differential carrier thrust bearing (714).

1. Remove the differential carrier assembly (700).
2. Remove the differential carrier sun gear (697).
3. Remove the park gear (696).
4. Remove the thrust bearing (695) from the differential carrier internal gear.
5. Remove the shaft differential carrier sun gear (689).

1. Position the transmission so that the case cover joint is facing upward.
2. Remove the input carrier assembly (672).
3. Remove the input carrier, reaction carrier lube dam (673). The dam may be stuck to the input carrier assembly.
4. Remove the thrust bearing (674) from the reaction carrier.
5. Remove the reaction carrier assembly (675).

1. Remove the thrust bearing (676) from the reaction sun gear.
2. Remove the reaction sun gear assembly (678).
3. Tilt the band in order to disengage the manual 2-1 band assembly (680) from the anchor pin. Remove the manual 2-1 band assembly from the case.

J 38358-A 1-2 Support Remover and Installer

1. Install J 38358-A onto the 1-2 support drum assembly (681-687).
2. Lift J 38358-A with the 1-2 support drum out of the case.
3. Tilt the forward band assembly (688) in order to disengage the band from the anchor pin in the case. Remove the forward band assembly.

J 28585 Snap Ring Remover

1. Remove the bearing (691) from the differential carrier internal gear.
2. Use J 28585 or a large screwdriver in order to remove the differential carrier internal gear snap ring (692).
3. Lift the differential carrier internal gear assembly (693) out of the case by depressing the park pawl assembly in order to clear the case.

1. Use side cutting pliers in order to remove the manual shift shaft pin (801).
2. Disconnect the manual valve link (402) from the IMS/detent lever assembly (811).
3. Remove the internal mode switch (IMS)/detent lever (811) and remove the park pawl actuator assembly (800).
4. Position the transmission so that the reverse band servo bore is facing upward.
5. Use a small screwdriver in order to pry the manual shift shaft seal (806) from the case.
6. Remove the park pawl actuator guide pin (808).
7. Remove the park pawl actuator guide assembly (809) from the case.
8. Remove the actuator guide seal (810) from the guide.

1. Inspect the components that are still on the transmission case for the following conditions: Loose, cross-threaded or damaged pipe fittings on the transmission oil cooler A loose, missing or damaged transmission name plate
2. Inspect the transmission case for the following conditions: Gasket sealing surfaces that are damaged or which have porosity Bolt or screw holes that are stripped or damaged (repair with a thread insert) Damaged or porous case oil passages Damaged snap ring grooves or housing splines Loose, missing or damaged band anchor pins Damaged or porous case surfaces Plugged drain back holes for the torque converter oil seal
3. Inspect the components that are still on the transmission case for the following conditions: A loose, plugged or damaged transmission vent assembly A loose, cross-threaded or damaged oil pressure test hole plug

1. Inspect the vent for damage or being plugged. If the vent is damaged, use channel locks and a large screwdriver in order to remove the vent assembly (37).
2. Remove the oil pressure test hole plug (38).

Assembly Procedure

1. Use a hammer and a punch in order to install the vent assembly (37), if necessary.
2. Apply sealant GM P/N 12345382 to the oil pressure test hole plug (38).
3. Install the oil pressure test hole plug (38). Tighten: Tighten the oil pressure test hole plug (38) to 12 N.m (106 lb in).

1. J 41103 Torque Converter Seal Remover Set
2. J 41103-1 Torque Converter Seal Puller Legs
3. J 41103-2 Torque Converter Seal Puller Bridge
4. J 41103-3 Torque Converter Seal Support Body

1. Insert the three J 41103-1 puller legs under the Torque Converter Seal (525).
2. Insert the J 41103-3 support body over the drive sprocket support (522).
3. Insert the J 41103-2 puller bridge over the J 41103-3 support body. Connect the J 41103-1 puller legs into the slots on the J 41103-2 bridge.
4. Tighten the forcing screw on the J 41103-2 puller bridge until the J 41103-1 puller legs remove the torque converter seal (525).

1. J 23907 Universal Slide Hammer and Puller
2. J 26941 Drive Sprocket Support Bearing Remover

1. Inspect the drive sprocket support (522) for the following conditions: Damaged splines A damaged drive sprocket support bearing A damaged turbine shaft bushing (pressed inside the support)
2. Remove the drive sprocket support bearing only if the bearing is damaged.
3. Remove the drive sprocket support assembly only if the support is damaged.
4. Assemble J 23907 and J 26941 .
5. Use J 23907 and J 26941 in order to remove the bearing assembly (521) from the drive sprocket support.
6. Remove the four drive sprocket support bolts (524).
7. Remove the drive sprocket support assembly (522).

1. J 8092 Driver Handle
2. J 28677 Drive Sprocket Support Bearing Installer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. J 36850 Transmission Assembly Lubricant

1. Assemble J 28677 and J 8092 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. Lubricate drive sprocket support bearing (521) with J 36850 .
3. Using the assembled tool, press in the drive sprocket support bearing (521).
4. Install the drive sprocket support assembly (522).
5. Install the four drive sprocket support bolts (524). Tighten: Tighten the bolts to 25 N.m (18 lb ft).

J 28540-A Converter Seal Installer

Scheme 130

Note. Install the seal onto the tool before installing into the case to prevent damage to the seal.

Use J 28540-A and a mallet in order to install the torque converter oil seal (525).

Installation Procedure

1. Inspect the park system components for the following conditions: A worn park pawl actuator guide (809) A damaged or bent park pawl actuator assembly (800) A damaged internal mode switch (IMS) detent lever (811) A bent or damaged manual valve link (402) A kinked or bent manual valve link spring (403)
2. Use a 9/16 inch socket and a hammer in order to install the manual shift shaft seal assembly (806) into the case.
3. Install a new park pawl actuator guide O-ring seal (810) onto the park pawl actuator guide (809).
4. Install the actuator guide assembly into the case.
5. Align the slot for the actuator guide pin (808) in the park pawl with the pin hole in the case.
6. Use a mallet in order to install the actuator guide pin (808).
7. Assemble the IMS (811) onto the park pawl actuator assembly (800).
8. Install the IMS detent lever assembly (811) and the park pawl actuator assembly (800) into the case.
9. Align the groove for the manual shift shaft pin with the pin hole in the case.
10. Use a mallet in order to install the manual shift shaft pin (801).

J 28585 Snap Ring Remover

1. Inspect the differential carrier internal gear assembly (693) for the following conditions: Damaged or worn bushings Plugged lube oil holes Damaged case splines Damaged or worn gear teeth A damaged or worn park pawl assembly (694) A damaged snap ring (692)
2. Install the differential carrier internal gear assembly (693) into the case. Align the park pawl assembly with the park pawl actuator assembly.
3. Use J 28585 or a long screwdriver in order to install the snap ring (692) into the case as shown.

1. Inspect the differential carrier assembly (700) for the following conditions: Damaged or worn teeth, bearing rollers, washers or pins on the differential planetary pinion gear Damaged or worn teeth or splines on the final drive sun gear (697) Damaged or worn teeth, splines or thrust washers on the differential side gear Damaged or worn teeth, thrust washers or shaft on the differential pinion gear Damaged or worn lugs or splines on the parking gear (696) A damaged vehicle speed sensor reluctor wheel Damaged internal gear/parking gear thrust bearing (695), differential carrier/sun gear thrust bearing (698) or differential carrier/case thrust bearing (715) A damaged or worn differential carrier/case selective thrust washer (714) A damaged differential/final drive carrier housing (700)
2. Inspect the final drive sun gear shaft (689) for the following conditions: Damaged or worn splines Cracks at lube oil holes Damaged or worn bearing journals
3. Use a feeler gauge in order to measure the end play of the differential carrier planetary pinion gear. Specification: End play should be 0.24-0.63 mm (0.009-0.025 in).
4. If the end play check or the component inspection indicates a condition, repair the differential/final drive carrier assembly (700).

1. Use a screwdriver in order to remove the snap ring (699) from the front differential carrier.
2. Remove the first planetary pinion by removing the following parts: The planetary pinion gear pin (712) The pinion thrust washers (708) The pinion gear roller bearings (709) The bearing roller spacer (710) The pinion (711)
3. Remove the remaining planetary pinions in the same way.
4. Remove the differential carrier sun gear thrust bearing assembly (698).
5. Place the final drive carrier components into an oil pan in order to make sure that none of the bearing rollers are lost.
6. Use a drift punch and a mallet in order to remove the differential pinion gear shaft pin (702).
7. Remove the differential pinion shaft (701).
8. Remove the differential pinion gears (704).
9. Remove the differential pinion gear thrust washers (703).
10. Remove the differential side gears (705).
11. Remove the differential side gear thrust washers (706).

J 36850 Assembly Lubricant (or equivalent)

1. Affix the differential side gear thrust washers (706) to the side gears (705). Apply J 36850 or equivalent.
2. Install the side gears (705) with the thrust washers into the differential carrier housing (700).
3. Affix the differential pinion thrust washers (703) to the pinion gears (704). Apply J 36850 or equivalent.
4. Install the pinion gears with thrust washers into the differential carrier housing (700). Rotate the pinion gears into position.
5. Install the differential pinion shaft (701) into the differential carrier housing.
6. Align the hole in the pinion gear shaft (701) to the hole in the differential carrier housing (700).
7. Use a drift punch and a mallet in order to install the pinion gear shaft pin (702) into the differential carrier housing (700).
8. Apply J 36850 or equivalent to the inside of a differential carrier planetary pinion gear (711).
9. For each planetary pinion gear, insert a bearing roller spacer (710) onto the pin (712). The spacer must be inserted between the two rows of bearing rollers.
10. For each planetary pinion gear, assemble the bearing rollers (709) into the gear (711) one at a time. Use plenty of J 36850 or equivalent in order to aid assembly Use a washer (708) on the bottom of the pinion gear (711) in order to help hold the bearing rollers (709) in place. The number of rollers in the pinion gear is model dependent: The 3.05/3.06 and 3.29/3.33 ratio differential carriers have two rows of 22 rollers (44 total) The 2.86/2.84 ratio differential carriers have two rows of 18 rollers (36 total) Occasionally twist the pinion gear pin (712) in order to help align the rollers
11. Install the differential carrier sun gear thrust bearing (698) into the carrier housing.
12. Remove each planetary pinion gear pin (712) from its pinion gear (711). Be careful not to move the rollers out of position.
13. Affix two pinion gear thrust washers (708) on each side of the pinion gear (711). Apply J 36850 or equivalent.
14. Install the pinion gear assemblies (711) into the carrier housing (700).
15. Install each planetary pinion gear pin (712).
16. Install the snap ring (699) over the planetary pinion gear pins.

J 22888-D Universal Bearing Puller. See Special Tools .

1. Do not remove the vehicle speed sensor reluctor wheel (713) unless the wheel is damaged.
2. Use J 22888-D and a piece of flat metal stock in order to remove the vehicle speed sensor reluctor wheel (713). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Warm the vehicle speed sensor reluctor wheel before installation
2. Use a plastic mallet in order to install the vehicle speed sensor reluctor wheel (713) onto the differential carrier housing. Tap evenly around the reluctor wheel with the mallet until fully seated.

J 36850 Assembly Lubricant (or equivalent)

1. Assemble the final drive sun gear (697) with the chamfered side toward the parking gear (696) into the differential/final drive carrier assembly (700).
2. Assemble the parking gear (696) onto the final drive sun gear shaft (689)
3. Assemble the final drive sun gear shaft/parking gear assembly (689/696) into the final drive sun gear (697).
4. Assemble the internal gear/parking gear thrust bearing (695) to the parking gear (696).
5. Install the differential/final drive carrier assembly into the case.

1. Inspect the case extension assembly (6) for the following conditions: A damaged or porous sealing surface for the case extension seal A damaged or porous sealing surface for the vehicle speed sensor A damaged or porous sealing surface for the right drive shaft oil seal assembly Damaged bolt holes A worn or damaged front differential carrier bushing (7A) or output shaft bearing assembly (7B) A porous or damaged case extension housing
2. Install the differential carrier/case selective thrust washer (714) onto the differential/final drive carrier assembly (700).
3. Install the thrust bearing (715) onto the differential/final drive carrier assembly (700).
4. Affix the seal (8) onto the case extension (6).
5. Install the case extension assembly (6) onto the case (3).
6. Install only two case extension bolts (5) for later removal. Tighten: Tighten the bolts until the extension is flush to the case.
7. Perform end play check, refer to «Differential Carrier End Play Check (FWD Only)»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul) .

1. Inspect the forward band assembly (688) for the following conditions: Damaged or severely worn friction material Damaged apply or anchor pin features
2. Inspect the bearing (691) from the differential carrier internal gear for damage.
3. Position the transmission case so that the flange for the case cover is facing up.
4. Install the bearing (691) for the differential carrier internal gear into the case. Position as indicated.
5. Install the forward band assembly (688) into the case. Locate the band assembly onto the forward band anchor pin Position the band apply pin feature in the opening of the case

1. Use a small screwdriver in order to gently pry the thrust bearing (685) off of the 1-2 support drum (687).
2. Lift the 1-2 clutch roller assembly (683) out of the 1-2 support drum.

1. Inspect the 1-2 support roller clutch components for the following conditions: A scored or burned contact surface for the manual 2-1 band on the 1-2 support drum (687) A damaged or worn forward drum bushing A damaged or worn inner race of the 1-2 support roller clutch A damaged or worn 1-2 clutch roller assembly (683) A damaged thrust bearing (685)
2. Install the 1-2 clutch roller assembly (683) into the 1-2 support drum.
3. Install the thrust bearing (685) onto the 1-2 support drum (687). Press down with hand pressure only.

1. Position the 1-2 support drum assembly (687) on the bench as shown.
2. Install the reaction sun gear assembly (678) into the 1-2 support drum (687).
3. Rotate the components as indicated by the arrows: The roller clutch should move freely in the indicated directions The roller clutch should lock in the direction opposite of that indicated
4. If the roller clutch does not function as described, reassemble the clutch correctly or replace the assembly.

J 38358-A 1-2 Support Remover/Installer

Scheme 131

Use J 38358-A in order to assemble the 1-2 support drum assembly (681-687) into the case.

1. Inspect the 2-1 manual band (680) for the following: Cracked or separated friction material Burnt friction material Cracks around the apply lugs
2. Squeeze the manual 2-1 band assembly (680) and install the assembly into the case.
3. Position the band on the anchor pin.

1. Inspect the reaction sun gear and drum assembly (678) for the following: Worn or scored bushings Damaged reaction sun gear teeth The band apply area of the drum for discoloration or wear The welds connecting the sun gear to the drum for voids or cracks A worn or damaged 1-2 support outer race
2. Install the reaction sun gear and drum assembly (678) into the case.
3. Check that the lugs engage with the 1-2 support roller clutch inner race.

1. Use feeler gages in order to check for excessive pinon gear end play in the input carrier assembly (672) and in the reaction carrier assembly (675).
2. End play should measure 0.23-0.77 mm (0.009-0.030 in).

J 36850 Assembly Lubricant (or equivalent)

1. Inspect the thrust bearings (671, 674, 676) for the following: A damaged cage Damaged or missing rollers
2. Inspect the reaction carrier assembly (675) for the following: Damage to the pinion teeth Damage to the internal gear teeth
3. Inspect the input carrier assembly (672) for the following: Damage to the pinion teeth Damage to the spline teeth
4. Install the reaction carrier/sun gear thrust bearing (676) into the reaction carrier assembly (675). Use J 36850 or equivalent in order to retain the bearing.
5. Install the reaction carrier assembly (675) into the case and rotate the carrier so that the pinions engage the reaction sun gear.
6. Install the input/reaction carrier thrust bearing (674) into the input carrier assembly (672). Use J 36850 or equivalent in order to retain the bearing.
7. Install the input carrier/reaction carrier lube dam (673) into the input carrier assembly (672). Use J 36850 or equivalent in order to retain the lube dam.
8. Insert the input carrier assembly (672) into the case and rotate the carrier so that the pinions engage the reaction carrier internal gear.

1. Inspect the reverse reaction drum (669) for the following: Cracks Damaged splines Distortion
2. Install the reverse reaction drum (669) into the case and engage the drum onto the input carrier splines.

Scheme 132

Disassemble the third and input clutch pawl assemblies (727, 728) and input sungear shaft (668) from the input clutch housing assembly (632).

1. Inspect the input sun gear (668) for the following: Worn or damaged splines Plugged lube holes or cracks
2. Inspect the third and input clutches pawl for the following: Worn or damaged splines Wear or cracks
3. Install the input clutch pawl assembly (728) onto the input sun gear shaft (668).
4. Install the third clutch pawl assembly (727) onto the input sun gear (668).

1. Hold the input sun gear (668) stationary in the position shown.
2. The third clutch pawl outer race (727) should rotate only in the direction shown by the arrow and not in the opposite direction.
3. The input clutch pawl assembly (728) should rotate only in the direction shown by the arrow and not in the opposite direction.

1. J 23327 Clutch Spring Compressor
2. J 25018-A Clutch Spring Compressor Adapter
3. J 8059 Snap Ring Pliers. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Use a flat blade screwdriver in order to remove the retaining ring (659) from the input shaft and housing assembly (632).
2. Remove the input clutch backing plate (658).
3. Remove all of the input clutch plate assemblies (656, 657).
4. Remove the input clutch waved plate (655) and the input clutch apply plate (654).
5. Use a flat blade screwdriver in order to remove the retaining ring (649) from the input shaft and housing assembly (632).
6. Remove the third clutch backing plate (648)
7. Remove the third clutch plate assemblies (646, 647).
8. Remove the third clutch waved plate (645).
9. Remove the input shaft thrust bearing assembly (644).
10. Use J 23327 and J 25018-A in order to compress the third clutch spring retainer and guide assembly.
11. Use J 8059 in order to remove the retaining ring (640) from the input shaft and housing assembly. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
12. Remove J 23327 and J 25018-A from the input shaft and housing assembly.
13. Remove the third clutch retainer and guide spring assembly (643).
14. Remove the third clutch piston and seal assembly (642).
15. Use J 23327 in order to compress the input clutch spring and retainer assembly.
16. Use J 8059 in order to remove the retainer ring (640) from the input shaft and housing assembly. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
17. Remove J 23327 from the input shaft and housing assembly.
18. Remove the third clutch piston housing (639).
19. Remove the input clutch spring and retainer assembly (637).
20. Remove the input clutch piston assembly (636).
21. Remove the input clutch piston outer seal (635).
22. Remove the third clutch piston inner seal (641).
23. Remove the third clutch housing O-ring seal (638).
24. Remove the input clutch piston inner seal (634).
25. Cut the input shaft oil seal rings (628).
26. Remove the input shaft oil seal rings (628).

1. Inspect the input clutch housing assembly (632) for the following: Plugged feed passages Worn or damaged splines Input shaft bushing (631) wear Seal ring groove nicks or burrs Cracks or blocked fluid passages in the input shaft Damage or wear to the thrust bearing (723) in the input clutch housing
2. With the ball check valve assembly in its seated position in transmission fluid, inspect the assembly for leaks.
3. Inspect the input clutch piston (636) for the following: Cracks or damage to seal grooves Wear on piston lugs
4. Inspect the input clutch spring and retainer assembly (637) for a damaged cage and distorted or missing springs.
5. Inspect the third clutch piston housing (639) for damage.
6. Inspect the third clutch spring retainer and guide assembly (643) for a damaged cage and distorted or missing springs.
7. Replace the third clutch piston and seal assembly (642).
8. Inspect the input shaft thrust bearing assembly (644) for damage or wear.

Scheme 133

Use a 6.25 mm (1/4 in) drift and mallet in order to remove the ball check valve assembly (633) from the input clutch housing.

Scheme 134

Use a 9.5 mm (3/8 in) drift punch and mallet in order to assemble a new ball check valve assembly (633) into the input clutch housing.

1. J 8059 Snap Ring Pliers. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. J 23327 Clutch Spring Compressor
3. J 25018-A Clutch Spring Compressor Adapter
4. J 37361 Input Clutch Inner Piston Seal Protector. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
5. J 37362 Third Clutch Inner Piston Seal Protector. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Use transmission fluid in order to lubricate the new input clutch piston inner seal (634).
2. Use J 37361 in order to install the new seal. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. Insert a new third clutch housing O-ring seal (638) in the input shaft and housing assembly.
4. Use transmission fluid in order to lubricate the new third clutch piston inner seal (641).
5. Use J 37362 in order to install the seal in the input shaft and housing assembly (632). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
6. Use transmission fluid in order to lubricate the new input clutch piston outer seal (635).
7. Insert the new seal onto the input clutch piston assembly (636).
8. Install the input clutch piston assembly (636) into the input shaft and housing assembly.
9. Install the input clutch spring and retainer assembly (637) into the input shaft and housing assembly.
10. Install the third clutch piston housing (639) into the input shaft and housing assembly.
11. Use J 23327 (1,2) and J 8059 (3) in order to install the third clutch piston housing retaining ring (640) in the input shaft and housing assembly. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
12. Remove the J 23327 (1,2).
13. Use transmission fluid in order to lubricate the new third clutch piston and seal assembly (642). Install the third clutch piston and seal assembly (642) into the input shaft and housing assembly (632).
14. Install the third clutch spring retainer and guide assembly (643) into the input shaft and housing assembly (632).
15. Use J 23327 (1,2), J 25018-A (4) and J 8059 (3) in order to install the third clutch spring retainer and guide assembly retaining ring (640). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
16. Remove the J 23327 (1,2).
17. Insert the third clutch waved plate (645) into the input shaft and housing assembly (632).
18. Insert the third clutch plates assemblies into the input housing. Start by inserting a third clutch plate (646) with external splines. Alternate with the internally splined clutch plates (647).
19. Insert the third clutch backing plate (648) with the word UP facing upward.
20. Insert the retaining ring (649) into the input shaft and housing assembly (632).
21. Insert the input clutch apply plate (654) into the input shaft and housing assembly (632), so that the notched side of the teeth are facing downward against the retaining ring on the third clutch backing plate.
22. Install the input clutch waved plate (655).
23. Install the input clutch plates (656/725, 657) starting with an input clutch steel plate (657) and alternating with input clutch fiber plate assemblies (656).
24. Insert the input clutch backing plate (658) with the tapered side of the teeth facing upward.
25. Insert the retaining ring (659) in the input shaft and housing assembly (632).
26. Insert the input shaft thrust bearing assembly (644).

1. Use a rubber tipped air nozzle in order to apply a maximum 138 kPa (20 psi) at each indicated fluid passage.
2. Listen for the following: The third clutch (1) assembly to apply The input clutch (2) assembly to apply

J 34741-A Input Seal Installer contains:. See Special Tools .

1. J 34741-1 Adjustable Seal Protector. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. J 34741-2 Seal Pusher. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. J 34741-3 Seal Sizer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Install J 34741-1 into the input clutch housing (632). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Adjust J 34741-1 so that the bottom of the seal installer aligns with the lowest seal ring groove. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. Use transmission fluid in order to lubricate the oil seal ring for the input clutch housing. Position the ring on the J 34741-1 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. Position J 34741-2 onto the J 34741-1 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Push the seal (628) into the seal ring groove.
4. Repeat this procedure for the second and the third seal rings (628).
5. Remove the input seal installer.
6. Use a twisting motion in order to assemble J 34741-3 over the seals. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
7. Leave J 34741-3 in place until the input clutch housing assembly (632) is assembled into the transmission. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Use a small screwdriver in order to align the teeth of the input clutch plate assembly and the third clutch plate assembly. This will ease installation of the clutch pawl assembly.
2. Insert the combined input clutch pawl (728), third clutch pawl (727) and input sun gear (668) assembly into the input clutch housing assembly (632).

1. J 26958 Output Shaft Loading and Aligning Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. J 26958-10B Adapter Plug. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. J 33381-A Final Drive Remover and Installer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
4. J 33386-A Input Shaft End Play Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
5. J 38385 Output Shaft Loading Tool Adapter. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
6. J 43425 Output Shaft Loading Tool Adapter. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Adjust the collar on tool J 33381-A to the 4T65-E CLUTCH & DRUM setting. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. Install J 33381-A into the input clutch housing assembly (632). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. Tighten the threaded rod of J 33381-A until the rod is finger tight. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
4. Use J 33381-A in order to lift the input clutch housing assembly (632). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . The sprag clutch assemblies will also be attached.
5. Install the assembly (632) into the case. Be sure that the assembly is down all the way.
6. Remove J 33381-A from the assembly. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
7. Install J 38385 (3) for a standard duty transmission or J 43425 (3) for a heavy duty transmission. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
8. Install J 26958-10B (2) depending on model. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Standard duty uses this tool with the smaller end (4) facing down. Heavy duty uses this tool with the larger end (5) facing down.
9. Install J 26958 (1) onto the case extension (6). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
10. Using two bolts, install J 33386-A onto the case. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
11. Tighten the bolts in order to securely hold J 33386-A . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
12. Tighten J 26958 finger tight in order to eliminate differential carrier end play. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
13. Insert the thrust washer (630) from the input clutch housing into J 33386-A as indicated. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . If the thrush washer will not fit into J 33386-A , select the next size smaller thrust washer and recheck. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
14. Use a feeler gauge in order to measure the clearance between J 33386-A and the thrust washer (630). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . If the clearance is less than 0.0521 mm (0.006 in), use the current size thrust washer. If the clearance is 0.0521 mm (0.006 in) or more, select the next size larger thrust washer and recheck. Refer to the Bearing/Input Clutch Hub Selective Thrust Washer (630) Selection Guide in «End Play Specifications»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__end-play-specifications) .
15. Remove J 33386-A . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
16. Adjust the collar on tool J 33381-A to the 4T65-E CLUTCH & DRUM setting. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Make sure that the threaded rod is fully loosened.
17. Install J 33381-A into the input clutch housing (632). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
18. Tighten the threaded rod of J 33381-A until the rod is finger tight. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
19. Use J 33381-A in order to lift the input clutch housing assembly (632). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . The sprag clutch assemblies will also be attached.
20. Remove the assembly (632) from the case.
21. Position the transmission so that the oil pan is facing down.
22. Remove J 26958 (1), J 26958-10B (2) and J 38385 (3) or J 43425 (3). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. J 33381-A Final Drive Remover and Installer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. J 33386-A Input Shaft End Play Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. J 36850 Assembly Lubricant
4. J 44472 End Play Checking Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Install the final drive sun gear shaft (689).
2. Use J 36850 or equivalent in order to retain the parking gear thrust bearing (695) to the parking gear (696).
3. Install the parking gear thrust bearing (695) and the parking gear (696).
4. Install the final drive sun gear (697).
5. Install J 44472 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
6. Adjust the collar on tool J 33381-A to the 4T65-E CLUTCH & DRUM setting. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
7. Install J 33381-A into the input clutch housing assembly (632). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
8. Tighten the threaded rod of J 33381-A until the rod is finger tight. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
9. Use J 33381-A in order to lift the input clutch housing assembly (632). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . The sprag clutch assemblies will also be attached.
10. Install the assembly (632) into the case. Be sure that the assembly is down all the way.
11. Remove J 33381-A from the assembly. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
12. Using two bolts, install J 33386-A onto the case. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
13. Tighten the bolts in order to securely hold J 33386-A . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
14. Tighten J 44472 finger tight in order to eliminate differential carrier end play. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
15. Insert the thrust washer (630) from the input clutch housing into J 33386-A as indicated. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . If the thrush washer will not fit into J 33386-A , select the next size smaller thrust washer and recheck. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
16. Use a feeler gauge in order to measure the clearance between J 33386-A and the thrust washer (630). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . If the clearance is less than 0.0521 mm (0.006 in), use the current size thrust washer. If the clearance is 0.0521 mm (0.006 in) or more, select the next size larger thrust washer and recheck. Refer to the Bearing/Input Clutch Hub Selective Thrust Washer (630) Selection Guide in «End Play Specifications»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__end-play-specifications) .
17. Remove J 33386-A . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
18. Adjust the collar on tool J 33381-A to the 4T65-E CLUTCH & DRUM setting. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Make sure that the threaded rod is fully loosened.
19. Install J 33381-A into the input clutch housing (632). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
20. Tighten the threaded rod of J 33381-A until the rod is finger tight. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
21. Use J 33381-A in order to lift the input clutch housing assembly (632). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . The sprag clutch assemblies will also be attached.
22. Remove the assembly (632) from the case.
23. Position the transmission so that the oil pan is facing down.
24. Remove J 44472 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
25. Remove the final drive sun gear (697).
26. Remove the parking gear (696) and the parking gear thrust bearing (695).
27. Remove the final drive sun gear shaft (689).

1. J 23327 Clutch Spring Compressor
2. J 38734 Spring Compressor Adapter

1. Use a flat blade screwdriver in order to remove the retaining ring (627) from the second clutch housing.
2. Remove the second clutch backing plate (626). Remove the alternating second clutch fiber plates (624). Remove the second clutch steel plates (625).
3. Remove the second clutch apply plate (716). Remove the second clutch waved plate (623).
4. Use J 23327 (1) and J 38734 (2) in order to compress the second clutch piston spring (621).
5. Remove the retaining ring (622).
6. Remove J 23327 and J 38734 from the second clutch housing (617).
7. Remove the second clutch spring assembly (621).
8. Remove the second clutch piston assembly (620).

1. Inspect the second clutch housing assembly (617) for the following: A leaking or damaged ball check valve in the second clutch housing. Turn the housing in order to seat the check ball. Use transmission fluid in order to check for leaks. Scored or worn bushings Discolored band surface or wear on the drum caused by excess heat Flatness of the band surface on the drum Damaged reverse reaction drum splines Cracks in welds
2. Inspect the backing plate (626) and the waved plate (623) of the second clutch for cracks or heat spots.
3. Inspect the steel plates (625) and the apply plate (716) of the second clutch for wear.
4. Inspect the fiber plates (624) of the second clutch for wear, flaking or lining separation.
5. Inspect the spring assembly (621) of the second clutch for damage to the ring cage. Check for distorted or missing springs.
6. Inspect the spring snap ring (622) of the second clutch for damage. Inspect the snap ring (627) of the second clutch backing plate for damage.

Scheme 135

Use a 6.25 mm (1/4 in) drift and a mallet in order to remove the ball check valve assembly (618) from the second clutch housing (617).

Scheme 136

Use a 6.25 mm (1/4 in) drift and a mallet in order to remove the ball check valve assembly (618) from the second clutch housing (617).

1. J 23327 Clutch Spring Compressor
2. J 38734 Spring Compressor Adapter
3. J 41992-1 Protector. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
4. J 41992-2 Adapter. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
5. J 41992-3 Installer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Install J 41992-2 (1) into the second clutch housing (617). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. Install the second clutch piston (620) and J 41992-3 (3) into J 41992-1 (2) protector. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. Install the second clutch piston and tool assembly into the second clutch housing assembly (617).
4. Use hand pressure to press down on J 41992-3 (3) until the second clutch piston (620) is seated. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
5. Remove J 41992-1 (2), J 41992-2 (1) and J 41992-3 (3). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . If necessary, gently tap with a punch through the center of the second clutch housing to remove the tools.
6. Assemble the second clutch spring assembly (621) into the second clutch housing assembly (617).
7. Use J 23327 (1) and J 38734 (2) in order to compress the second clutch piston spring (621).
8. Install the second clutch spring assembly retainer ring (622).
9. Remove J 23327 and J 38734 from the second clutch housing (617).
10. Install the second clutch waved plate (623) into the second clutch housing (617).
11. Install the second clutch apply plate (716) into the second clutch housing (617) with the marking DN or DOWN toward the piston.
12. Install the second clutch fiber plate assemblies (624) and the second clutch steel plates (625), starting with a fiber plate assembly.
13. Assemble the remaining plates, alternating between steel and fiber.
14. Install the second clutch backing plate (626) into the housing.
15. Install the second clutch backing plate retaining ring (627).

1. Inspect the reverse band assembly (615) for the following: Cracks Scoring Lining separation Wear of the fiber material
2. Inspect the apply lug for cracks.
3. Install the reverse band assembly (615) into the case with the band end aligned on the anchor pin in the case.

J 4670-01 Clutch Spring Compressor. See Special Tools .

1. Use J 4670-01 clutch spring compressor in order to compress the fourth clutch spring assembly (602). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Remove the snap ring (601) from the driven sprocket support assembly.
2. Remove the spring assembly (602) and remove the fourth clutch piston assembly (603) from the driven sprocket support assembly (609).
3. Remove the outer seal (604) from the fourth clutch piston (603).
4. Remove the inner seal (605) for the fourth clutch piston from the driven sprocket support assembly hub.
5. Remove the oil seal rings (613) from the driven sprocket support.

1. Inspect the driven sprocket support assembly (609) for the following: Worn or cut oil seal rings (612) Rolled or cut second clutch housing oil seal ring seals (613) Damage to the piston seal surface in the driven sprocket support assembly Blocked or porous oil passages in the driven sprocket support assembly A leaking or missing cup plug
2. Inspect the fourth clutch piston (603) for damage.
3. Inspect the thrust washer (611) from the second clutch housing for cracks or distortion.
4. Inspect the fourth clutch spring assembly (602) for distorted or missing springs.
5. Inspect the driven sprocket bearing assembly for foreign material and missing, flat or damaged rollers.
6. Replace the Teflon® seal rings (613) under the following conditions: The rings are cut or damaged You are performing a complete overhaul
7. Inspect all seal ring grooves for debris, burrs or damage.

1. J 34129 Bearing Remover. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. J 8092 Driver Handle

Scheme 137

Use J 34129 , J 8092 and a hammer in order to remove the driven sprocket support bearing assembly from the driven sprocket support assembly (609).

1. J 34126 Bearing Installer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. J 8092 Driver Handle

Scheme 138

Use J 34126 , J 8092 and a hammer in order to seat the driven sprocket support bearing assembly flush with or below the driven sprocket support assembly (609) hub.

J 4670-01 Clutch Spring Compressor. See Special Tools .

1. Use transmission fluid in order to lubricate a new fourth clutch piston outer seal (604). Install the seal onto the fourth clutch piston assembly (603).
2. Use transmission fluid in order to lubricate a new fourth clutch piston inner seal (605). Install the seal into the driven sprocket support hub.
3. Insert the fourth clutch piston assembly (603) into the driven sprocket support (609) and align as shown.
4. Insert the fourth clutch return spring assembly (602) into the piston.
5. Use J 4670-01 in order to install the fourth clutch spring retaining ring (601). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
6. If you are installing new second clutch housing oil seal rings (613), lubricate the rings. Install the oil seal rings (613) onto the driven sprocket support hub (609).

1. For the purposes of this test, attach the driven sprocket support assembly (609) and the second clutch housing thrust washer (611) onto the second clutch housing assembly (617).
2. Apply 138 kPa (20 psi) to the feed holes marked 2 and 4 and listen for the second and fourth clutches to apply.
3. Hold the pressure for five seconds. If the clutches do not apply and hold, then disassemble the driven sprocket support components. Inspect all of the seals and clutches for proper assembly. When finished, repeat the functional check.
4. When the clutches apply and hold correctly, remove the driven sprocket support assembly (609) and the second clutch housing thrust washer (611) from the second clutch housing assembly (617).

J 33381-A Clutch Assembly Remover/Installer. See Special Tools .

1. Install the selective thrust washer (630) and the thrust bearing assembly (629) onto the input clutch housing assembly (632).
2. Use a small screwdriver in order to align the second clutch teeth so that they slide onto the second clutch hub of the input clutch housing assembly (632).
3. Install the second clutch housing assembly (617) onto the second clutch hub of the input clutch housing assembly (632).
4. Adjust the collar on J 33381-A to 4T65-E CLUTCH & DRUM. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Make sure that the threaded rod is fully loosened.
5. Install J 33381-A into the input clutch housing assembly (632). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
6. Tighten the threaded rod of J 33381-A until the rod is finger tight. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
7. Use J 33381-A in order to lift the input and second clutch housing assembly (617, 632). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . The sprag clutch assemblies will also be attached.
8. Install the input and second clutch housing assembly (617, 632) into the case. Be sure that the assembly is down all the way.

J 36850 Assembly Lubricant (or equivalent)

1. Use J 36850 or equivalent in order to secure the second clutch housing thrust washer (611) to the driven sprocket support assembly (609).
2. Finger start two 13 mm case cover bolts (434) into the driven sprocket support assembly (609).
3. Using the bolts (434), lift the driven sprocket support assembly (609) into the case and align as shown. The top of the driven sprocket support assembly (609) should be flush with the case.

1. Cut the oil seal rings (513, 519) from the turbine shaft (518).
2. Remove the oil seal rings (513, 519).
3. Remove the drive sprocket retaining ring (515).
4. Remove the drive sprocket (516) from the turbine shaft (518).

1. J 29569-1 Turbine Shaft Seal Installer (Chain Side) Expander
2. J 29569-2 Turbine Shaft Seal Installer (Chain Side) Compressor
3. J 29829-1A Turbine Shaft Seal Installer (Converter Side) Expander. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
4. J 29829-2 Turbine Shaft Seal Installer (Converter Side) Compressor. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
5. J 36850 Assembly Lubricant (or equivalent)

1. Inspect the driven sprocket (506) for the following: Worn or chipped teeth Uniform teeth size Stripped or damaged splines Bearing surface damage
2. Inspect the fourth clutch shaft thrust washer (505) and the driven sprocket thrust washer (508) for wear or cracks.
3. Inspect the drive sprocket (516) for the following: Worn or chipped teeth Uniform teeth size Stripped or damaged splines Bearing surface damage
4. Inspect the turbine shaft (518) for the following: A cracked sleeve Damaged bushing journals Stripped or damaged splines
5. Inspect the drive sprocket thrust washers (514, 517) for wear or cracks.
6. Insert the turbine shaft (518) into the drive sprocket (516) and attach the drive sprocket retaining ring (515).
7. Install J 29569-1 onto the turbine shaft (518). Coat the tool shaft with J 36850 or equivalent.
8. Slide the turbine shaft oil seal rings (513) into position.
9. Use J 29569-2 in order to size the turbine shaft oil seal rings (513).
10. Install J 29829-1A onto the turbine shaft (518). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Coat the tool shaft with J 36850 or equivalent.
11. Slide the turbine shaft oil seal ring (519) into position.
12. Use J 29829-2 in order to size the turbine shaft oil seal ring (519). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

J 36850 Assembly Lubricant (or equivalent)

1. Inspect the drive link assembly (507) for damaged, cracked or binding links.
2. Inspect the input speed sensor reluctor wheel (527) for damaged reluctor teeth, worn or damaged thrust surface or damaged or missing locating pins.
3. Use J 36850 or equivalent in order to retain the drive sprocket thrust washer (517) onto the drive sprocket (516).
4. Use J 36850 or equivalent in order to retain the driven sprocket thrust washer (508) onto the driven sprocket (506).
5. Assemble the drive (516) and driven (506) sprockets into the drive link assembly (507) according to one of the following criteria: If the old drive link is being reinstalled, position both drive link assemblies with the master link (different color) facing up or down, whichever way it was found during disassembly If a new drive link assembly is being installed, position both drive link assemblies with the master link facing upward.
6. Install the drive link assembly (507) and the sprockets (506, 516) into the case by hand. A slight rocking motion may be required in order to work the sprockets into place.
7. Install the input speed sensor reluctor wheel (527) onto the drive sprocket (516).
8. Install the 4th clutch shaft thrust washer (505) onto the driven sprocket (506).

1. Inspect the fourth clutch assembly for the following conditions: Wear or damage to the steel plates (502, 528) Peened splines, flaking or worn fiber on the fiber plate assemblies (501), (529) and (530)
2. Inspect the fourth clutch shaft assembly (504) for the following conditions: Cut or worn fourth clutch plate splines Stripped input sun gear splines A damaged bushing journal Cracks or damage to the hub or shaft
3. Install the fourth clutch shaft assembly (504) into the case through the driven sprocket. The fourth clutch shaft assembly (504) must fully seat into the input sun gear.
4. Install the drive link lube scoop (608) into the case.
5. Install the fourth clutch apply plate (528) over the fourth clutch shaft assembly and into the driven sprocket support with the machined side towards the driven sprocket.
6. Install the remaining fourth clutch plates, starting with a fiber plate assembly (501) and alternating with steel plates (502). Some models use fiber on one side of each inner and outer plate (529, 530). Install with the fiber side up.
7. The fourth clutch steel plates (502, 528) should align with the driven sprocket support as shown.

1. Remove the manual valve (404).
2. Remove the 3-4 accumulator piston cylinder (421) and the 3-4 accumulator piston O-ring seal (422). Use low pressure compressed air from the valve body side if necessary for removal.
3. Remove the 3-4 accumulator piston outer spring (423) and inner spring (424).
4. Remove the 3-4 accumulator piston (428).
5. Remove the 3-4 accumulator piston pin (426) from the valve body side of the case cover (401).
6. Remove the actuator feed limit valve spring retainer (416).
7. Remove the actuator feed limit valve spring (415).
8. Remove the actuator feed limit valve (414).

1. Remove the manual valve (404).
2. Remove the 3-4 accumulator piston cylinder (421) and the 3-4 accumulator piston O-ring seal (422). Use low pressure compressed air from the valve body side if necessary for removal.
3. Remove the 3-4 accumulator piston outer spring (423) and inner spring (424).
4. Remove the 3-4 accumulator piston (428).
5. Remove the 3-4 accumulator piston pin (426) from the valve body side of the case cover (401).
6. Remove the actuator feed limit valve spring retainer (416).
7. Remove the actuator feed limit valve spring (415).
8. Remove the actuator feed limit valve (414).
9. Remove the low regulator valve bore plug (444).
10. Remove the low regulator valve (443).
11. Remove the low regulator valve spring (442).

1. Inspect the 3-4 accumulator piston (428) for the following conditions: Porosity A scored pin bore A nicked piston seal groove
2. Inspect the 3-4 accumulator piston pin (426) for scoring and free movement in the 3-4 accumulator piston bore.
3. Inspect the 3-4 accumulator outer spring (423) and inner spring (424) for distorted or broken coils.
4. Inspect the 3-4 accumulator piston cylinder (421) for the following conditions: Porosity or cracks A rough or scored seal surface A cut seal (422)
5. Inspect the low blow off ball valve (420A), the low blow off ball valve spring (406) and the low blow off ball valve bore plug (405).
6. Inspect the TCC blow off ball valve (420B), the TCC blow off ball valve spring (418) and the TCC blow off ball valve bore plug (417).
7. Inspect the manual valve (404), the manual valve link (402) and the manual valve clip (403) for damage.
8. Inspect the manual valve (404) for binding or looseness in the case cover assembly (401).
9. Inspect the case cover bore plugs (411) and the orificed cup plug (412). Correct the following conditions: Plug is loose Plug is missing Orifice is plugged
10. Inspect the drive shaft bearing assembly (431).
11. Inspect the axle oil seal assembly (409) for a missing garter spring or for a cut lip seal.
12. Inspect the case cover (401) for the following: Porosity Interconnected fluid passages Cracks or rough machined surfaces
13. Inspect the input speed sensor assembly (440) for the following conditions: Damaged or missing magnet Damaged housing Bent or missing electrical terminals Damaged input speed sensor clip (441)

1. Inspect the 3-4 accumulator piston (428) for the following conditions: Porosity A scored pin bore A nicked piston seal groove
2. Inspect the 3-4 accumulator piston pin (426) for scoring and free movement in the 3-4 accumulator piston bore.
3. Inspect the 3-4 accumulator outer spring (423) and inner spring (424) for distorted or broken coils.
4. Inspect the 3-4 accumulator piston cylinder (421) for the following conditions: Porosity or cracks A rough or scored seal surface A cut seal (422)
5. Inspect the low regulator valve spring (422), the low regulator valve (443) and the low regulator valve bore plug (444).
6. Inspect the TCC blow off ball valve (420B), the TCC blow off ball valve spring (418) and the TCC blow off ball valve bore plug (417).
7. Inspect the manual valve (404), the manual valve link (402) and the manual valve clip (403) for damage.
8. Inspect the manual valve (404) for binding or looseness in the case cover assembly (401).
9. Inspect the case cover bore plugs (411) and the orificed cup plug (412). Correct the following conditions: Plug is loose Plug is missing Orifice is plugged
10. Inspect the drive shaft bearing assembly (431).
11. Inspect the axle oil seal assembly (409) for a missing garter spring or for a cut lip seal.
12. Inspect the case cover (401) for the following: Porosity Interconnected fluid passages Cracks or rough machined surfaces
13. Inspect the input speed sensor assembly (440) for the following conditions: Damaged or missing magnet Damaged housing Bent or missing electrical terminals Damaged input speed sensor clip (441)

1. J 8092 Driver Handle
2. J 41991 Driveshaft Bearing Remover/Installer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Assemble J 8092 and J 41991 for bearing removal. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. Place the case cover (400) on a clean, flat surface with the spacer plate mating surface up.
3. Using the assembled tool, press the drive shaft bearing assembly (431) from the case cover (400).

1. J 8092 Driver Handle
2. J 41991 Driveshaft Bearing Remover/Installer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Assemble J 8092 and J 41991 for bearing installation. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. Place the case cover (400) on a clean, flat surface with the case mating surface up.
3. Using the assembled tool, press the drive shaft bearing (431) into the case cover (400).

J 34115 Left Side Axle Seal Installer. See Special Tools .

Scheme 139

Note. Install the seal onto the tool before installing into the case to prevent damage to the seal.

Use J 34115 in order to install the left side axle oil seal assembly (409). See Special Tools .

1. Install a new 3-4 accumulator piston cylinder O-ring seal (422) onto the 3-4 accumulator piston cylinder (421).
2. Install the 3-4 accumulator piston outer spring (423) and inner spring (424) into the 3-4 accumulator piston cylinder (421).
3. Install a new 3-4 accumulator piston seal (427) onto the 3-4 accumulator piston (428).
4. Insert the 3-4 accumulator piston (428) into the 3-4 accumulator piston cylinder (421).
5. Using a slight twisting motion, insert the 3-4 accumulator piston cylinder (421) into the case cover (401).
6. Insert the 3-4 accumulator piston pin (426) through the front of the case cover (401) and into the 3-4 accumulator piston (428).
7. Install the manual valve (404) into the case cover (401).
8. Install the actuator feed limit valve (414) into the case cover (401).
9. Install the actuator feed limit valve spring (415) into the case cover (401).
10. Install the actuator feed limit valve spring retainer (416) into the case cover (401).

1. Install a new 3-4 accumulator piston cylinder O-ring seal (422) onto the 3-4 accumulator piston cylinder (421).
2. Install the 3-4 accumulator piston outer spring (423) and inner spring (424) into the 3-4 accumulator piston cylinder (421).
3. Install a new 3-4 accumulator piston seal (427) onto the 3-4 accumulator piston (428).
4. Insert the 3-4 accumulator piston (428) into the 3-4 accumulator piston cylinder (421).
5. Using a slight twisting motion, insert the 3-4 accumulator piston cylinder (421) into the case cover (401).
6. Insert the 3-4 accumulator piston pin (426) through the front of the case cover (401) and into the 3-4 accumulator piston (428).
7. Install the manual valve (404) into the case cover (401).
8. Install the actuator feed limit valve (414) into the case cover (401).
9. Install the actuator feed limit valve spring (415) into the case cover (401).
10. Install the actuator feed limit valve spring retainer (416) into the case cover (401).
11. Install the low regulator valve spring (442).
12. Install the low regulator valve (443).
13. Install the low regulator valve bore plug (444).

1. J 36850 Assembly Lubricant (or equivalent)
2. J44538 TORX® 30+. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Install the case cover upper gasket (430) and the case cover lower gasket (429) on the case.
2. Use J 36850 or equivalent in order to retain the fourth clutch shaft thrust washer (432) and the drive sprocket/case cover thrust washer (514) to the case cover (400).
3. Make sure that the manual valve (404) is held in place and assemble the case cover (400) onto the pins in the case.
4. Finger start all transaxle case cover bolts (433-436) into the locations noted. Tighten: Tighten the M 6 size bolts (434, 436) to 12 N.m (106 lb in). Tighten the M 8 size bolts (435) to 25 N.m (18 lb ft). Tighten the M 6 size bolts (433) to 12 N.m (106 lb in) using J44538 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Install the oil dam (27) into the case.
2. Assemble the manual valve link onto the manual shift detent lever/IMS detent lever.
3. Connect the manual valve link (402) to the manual valve (404).
4. Install the manual valve link spring (403).
5. Install the manual shift detent assembly (804) and the manual shift detent bolt (805). Tighten: Tighten the bolt to 12 N.m (106 lb in).
6. Carefully install the input speed sensor (440) into the case cover (400).
7. Install the input speed sensor clip (441) into the case cover (400).

1. J 8001 Dial Indicator Set
2. J 25025-8 Dial Indicator Mounting Post. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. J 26958-10A Adapter Plug
4. J 28585 Snap Ring Remover

1. Make sure that the differential carrier/case thrust washer (714) and the thrust bearing (715) are still on the differential/final drive carrier assembly (700).
2. Install the case extension seal (8) onto the case extension (6).
3. Install the case extension assembly (6) onto the transmission (3).
4. Install only two of the four case extension bolts (5). Tighten: Do not torque the bolts. Tighten them only until the case extension is fully seated.
5. Position the transmission so that the case extension is facing upward.
6. Install J 25025-8 , J 26958-10A and J 8001 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
7. Set the dial indicator to zero.
8. Use J 28585 or a large screwdriver in order to lift the differential/final drive carrier assembly. Pry up on the vehicle speed sensor reluctor wheel through the vehicle speed sensor hole in the case extension.
9. Note the dial indicator reading before changing the differential carrier/case thrust washer (714): If the dial indicator reading is less than 0.12 mm (0.005 in), install the next smaller size thrust washer, then recheck. If the dial indicator reading is greater than 0.62 mm (0.025 in), install the next larger size thrust washer, then recheck. If the dial indicator reading is 0.12-0.62 mm (0.005-0.025 in), the thrust washer is correct.
10. Remove J 8001 and J 25025-8 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
11. Install the case extension bolts (5). Tighten: Tighten the case extension bolts to 36 N.m (26 lb ft).

1. J 23129 Seal Remover
2. J 6125-1B Slide Hammer

Scheme 140

Use J 23129 and J 6125-1B in order to remove the axle oil seal assembly (4) from the case extension assembly (6).

1. J 29130 Axle Seal Installer. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. J 8092 Driver Handle

Scheme 141

Note. Install the seal onto the tool before installing into the case to prevent damage to the seal.

Use J 29130 and J 8092 in order to install the axle oil seal assembly (4) on the case extension assembly.

1. Inspect the vehicle speed sensor assembly (10) and the vehicle speed sensor O-ring seal (11) for the following conditions: Damaged connector Cracked housing Signs of rotor damage Cuts or nicks on the O-ring seal
2. Install a new O-ring seal (11) on the vehicle speed sensor assembly (10).
3. Install the vehicle speed sensor assembly (10) into the case extension.
4. Install the vehicle speed sensor bolt (9). Tighten: Tighten the bolt to 12 N.m (106 lb in).

Cleaning Procedure

1. Clean the control valve body thoroughly in clean solvent.
2. Move the valves with a pick or a small screwdriver in order to dislodge any dirt or debris.
3. Use an air nozzle in order to dry the control valve body and to blow out all of the passages.
4. Gently probe the small passages with a piece of identification tag wire or the equivalent.

1. Inspect the control valve body (301) for the following conditions: Worn or damaged oil pump drive shaft bearing journal (not serviceable separately from the control valve body) Damaged or porous casting Damaged sealing surfaces Debris in fluid passages
2. Use a small pick or screwdriver. Before disassembly, inspect the control valve body (301) components for the following conditions: Valves binding or sticking in their bores or bushings Broken, missing or damaged springs Missing or damaged retainers Damaged solenoid valves Debris in valve line-ups or solenoid valves
3. During disassembly, inspect the control valve body for the following conditions: Worn or damaged valves, valve bores or bushings Broken, missing or damaged springs Missing or damaged retainers Damaged solenoid valves Debris in valve line-ups or solenoid valves
4. Inspect the transmission fluid pressure (TFP) manual valve position switch assembly (395) for the following conditions: Damaged electrical connector terminals Damaged seals Damaged switch membranes Debris on the switch membranes

1. Using a small screwdriver or pick, remove the line boost valve and bushing retainer (302) from the control valve body (301).
2. Remove the line boost valve bore plug (303), line boost valve (304), reverse boost valve bushing (309), reverse boost valve (310), pressure regulator valve outer and inner springs (311, 312) and pressure regulator valve (313) from the control valve body (301).
3. Using a small screwdriver or pick, remove the 1-2, 3-4 shift solenoid valve retainer (314D) from the control valve body (301).
4. Remove the 1-2, 3-4 shift solenoid (SS) valve (315A), 1-2 shift valve (318) and 1-2 shift valve spring (317) from the control valve body (301).
5. Remove the O-ring seal (316) from the 1-2, 3-4 SS valve (315A) ONLY if it is damaged.
6. Using a small screwdriver or pick, remove the pressure control solenoid valve retainer (314E) from the control valve body (301).
7. Remove the pressure control (PC) solenoid valve (322), torque signal regulator valve (321) and torque signal regulator valve spring (320) from the control valve body (301).
8. Remove the O-ring seals (307, 316) from the PC solenoid valve (322) ONLY if they are damaged.
9. Using a small screwdriver or pick, remove the line pressure relief valve spring retainer (325) from the control valve body (301).
10. Remove the line pressure relief valve spring (323) and the line pressure relief valve (324) from the control valve body (301).
11. Using a small screwdriver or pick, remove the TCC PWM solenoid valve retainer (314F) from the control valve body (301).
12. Remove the TCC PWM solenoid valve (334), TCC control valve (335) and TCC control valve spring (336) from the control valve body (301).
13. Remove the O-ring seals (305, 306) from the TCC PWM solenoid valve (334) ONLY if they are damaged.
14. Using a small screwdriver or pick, remove the TCC regulator apply valve bore plug retainer (314G) from the control valve body (301).
15. Remove the TCC regulator apply valve bore plug (329), O-ring seal (328), TCC regulator apply valve (327) and TCC regulator apply valve spring (326) from the control valve body (301).
16. Using a small screwdriver or pick, remove the 2-3 shift solenoid valve retainer (314C) from the control valve body (301).
17. Remove the 2-3 shift solenoid (SS) valve (315B) from the control valve body (301).
18. Remove the O-ring seal (316) from the 2-3 SS valve (315B) ONLY if it is damaged.
19. Using a small screwdriver or pick, remove the 4-3 manual downshift valve retainer (314B) from the control valve body (301).
20. Remove the 4-3 manual downshift valve bore plug (359), 4-3 manual downshift valve (360), 4-3 manual downshift valve spring (361) and 3-4 shift valve (362) from the control valve body (301).
21. Using a small screwdriver or pick, remove the 3-2 manual downshift valve retainer (353) from the control valve body (301).
22. Remove the 3-2 manual downshift valve bore plug (354), 3-2 manual downshift valve spring (355), 3-2 manual downshift valve (356) and 2-3 shift valve (357) from the control valve body (301).
23. Using a small screwdriver or pick, remove the 1-2 accumulator valve retainer (314A) from the control valve body (301).
24. Remove the 1-2 accumulator valve bore plug (339), 1-2 accumulator valve (350) and 1-2 accumulator valve spring (351) from the control valve body (301).
25. Using a small screwdriver or pick, remove the 2-3 accumulator valve bushing assembly retainer (385) from the control valve body (301).
26. Remove the 2-3 accumulator valve bushing assembly (345), 3-4 accumulator valve (341) and 3-4 accumulator valve spring (340) from the control valve body (301).
27. Using a small screwdriver or pick, remove the 2-3 accumulator valve bore plug retainer (342) from the 2-3 accumulator valve bushing (345).
28. Remove the 2-3 accumulator valve bore plug (343), the 2-3 accumulator valve spring (346) and the 2-3 accumulator valve (344) from the 2-3 accumulator valve bushing (345).

1. Using a small screwdriver or pick, remove the line boost valve and bushing retainer (302) from the control valve body (301).
2. Remove the line boost valve bore plug (303), line boost valve (304), reverse boost valve bushing (309), reverse boost valve (310), pressure regulator valve outer and inner springs (311, 312) and pressure regulator valve (313) from the control valve body (301).
3. Using a small screwdriver or pick, remove the 1-2, 3-4 shift solenoid valve retainer (314D) from the control valve body (301).
4. Remove the 1-2, 3-4 shift solenoid (SS) valve (315A), 1-2 shift valve (318) and 1-2 shift valve spring (317) from the control valve body (301).
5. Remove the O-ring seal (316) from the 1-2, 3-4 SS valve (315A) ONLY if it is damaged.
6. Using a small screwdriver or pick, remove the pressure control solenoid valve retainer (314E) from the control valve body (301).
7. Remove the pressure control (PC) solenoid valve (322), torque signal regulator valve (321) and torque signal regulator valve spring (320) from the control valve body (301).
8. Remove the O-ring seals (307, 316) from the PC solenoid valve (322) ONLY if they are damaged.
9. Using a small screwdriver or pick, remove the line pressure relief valve spring retainer (325) from the control valve body (301).
10. Remove the line pressure relief valve spring (323) and the line pressure relief valve (324) from the control valve body (301).
11. Using a small screwdriver or pick, remove the TCC PWM solenoid valve retainer (314F) from the control valve body (301).
12. Remove the TCC PWM solenoid valve (334), TCC control valve (335) and TCC control valve spring (336) from the control valve body (301).
13. Remove the O-ring seals (305, 306) from the TCC PWM solenoid valve (334) ONLY if they are damaged.
14. Using a small screwdriver or pick, remove the TCC regulator apply valve bore plug retainer (314G) from the control valve body (301).
15. Remove the TCC regulator apply valve bore plug (329), O-ring seal (328), TCC regulator apply valve (327) and TCC regulator apply valve spring (326) from the control valve body (301).
16. Using a small screwdriver or pick, remove the 2-3 shift solenoid valve retainer (314C) from the control valve body (301).
17. Remove the 2-3 shift solenoid (SS) valve (315B) from the control valve body (301).
18. Remove the O-ring seal (316) from the 2-3 SS valve (315B) ONLY if it is damaged.
19. Using a small screwdriver or pick, remove the 4-3 manual downshift valve retainer (314B) from the control valve body (301).
20. Remove the 4-3 manual downshift valve bore plug (359), 4-3 manual downshift valve (360), 4-3 manual downshift valve spring (361) and 3-4 shift valve (362) from the control valve body (301).
21. Using a small screwdriver or pick, remove the 3-2 manual downshift valve retainer (353) from the control valve body (301).
22. Remove the 3-2 manual downshift valve bore plug (354), 3-2 manual downshift valve spring (355), 3-2 manual downshift valve (356) and 2-3 shift valve (357) from the control valve body (301).
23. Using a small screwdriver or pick, remove the 1-2 accumulator valve retainer (314A) from the control valve body (301).
24. Remove the 1-2 accumulator valve bore plug (339), 1-2 accumulator valve (350) and 1-2 accumulator valve spring (351) from the control valve body (301).
25. Using a small screwdriver or pick, remove the 2-3 accumulator valve bushing assembly retainer (385) from the control valve body (301).
26. Remove the 2-3 accumulator valve bushing assembly (345), 3-4 accumulator valve (341) and 3-4 accumulator valve spring (340) from the control valve body (301).
27. Using a small screwdriver or pick, remove the 2-3 accumulator valve bore plug retainer (342) from the 2-3 accumulator valve bushing (345).
28. Remove the 2-3 accumulator valve bore plug (343), the 2-3 accumulator valve spring (346) and the 2-3 accumulator valve (344) from the 2-3 accumulator valve bushing (345).

1. Install the 2-3 accumulator valve (344), the 2-3 accumulator valve spring (346) and the 2-3 accumulator valve bore plug (343) into the 2-3 accumulator valve bushing (345).
2. Install the 2-3 accumulator valve bore plug retainer (342) in the 2-3 accumulator valve bushing (345), into the slot indicated.
3. Install the 3-4 accumulator valve spring (340), the 3-4 accumulator valve (341) and the 2-3 accumulator valve bushing (345) into the control valve body (301).
4. Hold the 2-3 accumulator valve bushing assembly (345) in the control valve body (301). Install the 2-3 accumulator valve bushing assembly retainer (385) into the slot indicated.
5. Install the 1-2 accumulator valve spring (351), the 1-2 accumulator valve (350) and the 1-2 accumulator valve bore plug (339) into the control valve body (301).
6. Hold the 1-2 accumulator valve bore plug (339) in the control valve body (301). Install the 1-2 accumulator valve retainer (314A) into the control valve body (301).
7. Install the 2-3 shift valve (357), the 3-2 manual downshift valve (356), the 3-2 manual downshift valve spring (355) and the 3-2 manual downshift valve bore plug (354) into the control valve body (301).
8. Hold the 3-2 manual downshift valve bore plug (354) in the control valve body (301). Install the 3-2 manual downshift valve retainer (353) into the control valve body (301).
9. Install the 3-4 shift valve (362), the 4-3 manual downshift valve spring (361), the 4-3 manual downshift valve (360) and the 4-3 manual downshift valve bore plug (359) into the control valve body (301).
10. Hold the 4-3 manual downshift valve bore plug (359) in the control valve body (301). Install the 4-3 manual downshift valve retainer (314B) into the control valve body (301).
11. Install a new O-ring seal (316) onto the 2-3 shift solenoid (SS) valve (315B), if it was removed.
12. Install the 2-3 SS valve (315B) into the control valve body (301).
13. Install the 2-3 shift solenoid valve retainer (314C) into the control valve body (301).
14. Install the TCC regulator apply valve bore plug O-ring seal (328) onto the TCC regulator apply valve bore plug (329).
15. Install the TCC regulator apply valve spring (326), the TCC regulator apply valve (327) and the TCC regulator apply valve bore plug (329) into the control valve body (301).
16. Hold the TCC regulator apply valve bore plug (329) in the control valve body (301). Install the TCC regulator apply valve bore plug retainer (314G) into the control valve body (301).
17. Install new O-ring seals (305, 306) onto the TCC PWM solenoid valve (334) if they had been removed.
18. Install the TCC control valve spring (336), the TCC control valve (335) and the TCC PWM solenoid valve (334) into the control valve body (301).
19. Hold the TCC PWM solenoid valve (334) in the control valve body (301). Install the TCC PWM solenoid valve retainer (314F) into the control valve body (301).
20. Install the line pressure relief valve (324) and the line pressure relief valve spring (323) into the control valve body (301).
21. Compress the line pressure relief valve spring (323) into the control valve body (301). Install the line pressure relief valve spring retainer (325) into the control valve body (301).
22. Install new O-ring seals (307, 316) onto the pressure control (PC) solenoid valve (322), if they had been removed.
23. Install the torque signal regulator valve spring (320), the torque signal regulator valve (321) and the PC solenoid valve (322) into the control valve body (301).
24. Hold the PC solenoid valve (322) in the control valve body (301). Install the pressure control solenoid valve retainer (314E) into the control valve body (301).
25. Install a new O-ring seal (316) onto the 1-2, 3-4 shift solenoid (SS) valve (315A), if it was removed.
26. Install the 1-2 shift valve spring (317), the 1-2 shift valve (318) and the 1-2, 3-4 SS valve (315A) into the control valve body (301).
27. Hold the 1-2, 3-4 SS valve (315A) in the control valve body (301). Install the 1-2, 3-4 shift solenoid valve retainer (314D) into the control valve body (301).
28. Install the reverse boost valve (310), the line boost valve (304) and the line boost valve bore plug (303) into the reverse boost valve bushing (309).
29. Install the pressure regulator valve (313), the pressure regulator valve outer and inner springs (311, 312) and the reverse boost valve bushing assembly (309) into the control valve body (301).
30. Hold the reverse boost valve bushing assembly (309) in the control valve body (301). Install the line boost valve and bushing retainer (302) into the control valve body (301).

1. Install the 2-3 accumulator valve (344), the 2-3 accumulator valve spring (346) and the 2-3 accumulator valve bore plug (343) into the 2-3 accumulator valve bushing (345).
2. Install the 2-3 accumulator valve bore plug retainer (342) in the 2-3 accumulator valve bushing (345), into the slot indicated.
3. Install the 3-4 accumulator valve spring (340), the 3-4 accumulator valve (341) and the 2-3 accumulator valve bushing (345) into the control valve body (301).
4. Hold the 2-3 accumulator valve bushing assembly (345) in the control valve body (301). Install the 2-3 accumulator valve bushing assembly retainer (385) into the slot indicated.
5. Install the 1-2 accumulator valve spring (351), the 1-2 accumulator valve (350) and the 1-2 accumulator valve bore plug (339) into the control valve body (301).
6. Hold the 1-2 accumulator valve bore plug (339) in the control valve body (301). Install the 1-2 accumulator valve retainer (314A) into the control valve body (301).
7. Install the 2-3 shift valve (357), the 3-2 manual downshift valve (356), the 3-2 manual downshift valve spring (355) and the 3-2 manual downshift valve bore plug (354) into the control valve body (301).
8. Hold the 3-2 manual downshift valve bore plug (354) in the control valve body (301). Install the 3-2 manual downshift valve retainer (353) into the control valve body (301).
9. Install the 3-4 shift valve (362), the 4-3 manual downshift valve spring (361), the 4-3 manual downshift valve (360) and the 4-3 manual downshift valve bore plug (359) into the control valve body (301).
10. Hold the 4-3 manual downshift valve bore plug (359) in the control valve body (301). Install the 4-3 manual downshift valve retainer (314B) into the control valve body (301).
11. Install a new O-ring seal (316) onto the 2-3 shift solenoid (SS) valve (315B), if it was removed.
12. Install the 2-3 SS valve (315B) into the control valve body (301).
13. Install the 2-3 shift solenoid valve retainer (314C) into the control valve body (301).
14. Install the TCC regulator apply valve bore plug O-ring seal (328) onto the TCC regulator apply valve bore plug (329).
15. Install the TCC regulator apply valve spring (326), the TCC regulator apply valve (327) and the TCC regulator apply valve bore plug (329) into the control valve body (301).
16. Hold the TCC regulator apply valve bore plug (329) in the control valve body (301). Install the TCC regulator apply valve bore plug retainer (314G) into the control valve body (301).
17. Install new O-ring seals (305, 306) onto the TCC PWM solenoid valve (334) if they had been removed.
18. Install the TCC control valve spring (336), the TCC control valve (335) and the TCC PWM solenoid valve (334) into the control valve body (301).
19. Hold the TCC PWM solenoid valve (334) in the control valve body (301). Install the TCC PWM solenoid valve retainer (314F) into the control valve body (301).
20. Install the line pressure relief valve (324) and the line pressure relief valve spring (323) into the control valve body (301).
21. Compress the line pressure relief valve spring (323) into the control valve body (301). Install the line pressure relief valve spring retainer (325) into the control valve body (301).
22. Install new O-ring seals (307, 316) onto the pressure control (PC) solenoid valve (322), if they had been removed.
23. Install the torque signal regulator valve spring (320), the torque signal regulator valve (321) and the PC solenoid valve (322) into the control valve body (301).
24. Hold the PC solenoid valve (322) in the control valve body (301). Install the pressure control solenoid valve retainer (314E) into the control valve body (301).
25. Install a new O-ring seal (316) onto the 1-2, 3-4 shift solenoid (SS) valve (315A), if it was removed.
26. Install the 1-2 shift valve spring (317), the 1-2 shift valve (318) and the 1-2, 3-4 SS valve (315A) into the control valve body (301).
27. Hold the 1-2, 3-4 SS valve (315A) in the control valve body (301). Install the 1-2, 3-4 shift solenoid valve retainer (314D) into the control valve body (301).
28. Install the reverse boost valve (310), the line boost valve (304) and the line boost valve bore plug (303) into the reverse boost valve bushing (309).
29. Install the pressure regulator valve (313), the pressure regulator valve outer and inner springs (311, 312) and the reverse boost valve bushing assembly (309) into the control valve body (301).
30. Hold the reverse boost valve bushing assembly (309) in the control valve body (301). Install the line boost valve and bushing retainer (302) into the control valve body (301).

1. Inspect the oil pump drive shaft (227) for the following: A scored or rough journal surface Stripped or burred splines A cut or damaged seal
2. Install a new oil pump drive shaft seal (228) onto the oil pump drive shaft (227).
3. Install the oil pump drive shaft assembly (227) into the case cover (400).

J 36850 Assembly Lubricant (or equivalent)

1. Inspect the control valve body spacer plate and gasket assembly (396) for the following root cause: Plugged holes Damaged gasket sealing surfaces Plugged or damaged screen/seal assemblies (382)
2. Inspect each ball check valve seat (one at a time) on the spacer plate (370) for excessive peening. Place a ball check valve (372) on each seat Use a flashlight to look for visible light between the ball check valve and the seat.
3. Install 4 ball check valves (372) into the case cover (400), in the positions shown. Use J 36850 or equivalent in order to hold the ball check valves in the case cover (400).
4. Install the 2 larger ball check valves (373) and the 4 smaller ball check valves (372) into the control valve body (300). Use J 36850 or equivalent in order to retain the ball check valves in the control valve body (300).
5. Install the screen/seal assemblies (382) into the spacer plate and gasket assembly (396).
6. Install the NEW spacer plate and gasket assembly (396) onto the control valve body (300).
7. Install the bolts (368) to hold the spacer plate and gaskets onto the control valve body (300).
8. Install the control valve body alignment sleeve (410) into the case cover (400).
9. Install the control valve body (300) onto the case cover (400).
10. Install the transmission fluid pressure (TFP) manual valve position switch assembly (395) onto the control valve body (300).
11. Install the control valve body bolts (374-381, 384) as indicated.
12. Tighten the control valve body bolts (374-381, 384). Tighten: 374 - 12 N.m (106 lb in) 375 - 12 N.m (106 lb in) 376 - 12 N.m (106 lb in) 377 - 12 N.m (106 lb in) 378 - 12 N.m (106 lb in) 379 - 16 N.m (11 lb ft) 380 - 25 N.m (18 lb ft) 381 - 8 N.m (70 lb in) 384 - 12 N.m (106 lb in)

1. Remove the oil pump cover (201).
2. Remove the pump rotor (210) and the vane rings (209).
3. Remove the vanes (211), the oil seal ring (212) and the slide O-ring seal (213).
4. Remove the outer and the inner oil pump prime springs (222, 223).
5. Remove the pump slide seal (220) and the slide seal support (221).
6. Remove the pump slide pivot pin (215).
7. Remove the pump body (227) from the pump base (229).
8. Remove the pump pivot pin (228).

1. Inspect the oil pump for: Worn, scored or gouged pump slide (214) Cracks, wear or damage to the rotor (210) or the vanes (211) Cuts or damage to the seals (212, 213, 220, 221) Broken priming springs (222, 223) Damaged oil pump drive shaft bearing (208) - the bearing is not serviced separately from the rotor.
2. Inspect the oil pump body (228) and the base (229) for: Porosity A worn, scored or damaged pump pocket Interconnected oil passages Damaged machined surfaces
3. Inspect the oil pump cover (201) for cracks, wear or gouges from the pump vanes.
4. Install the pump pivot pin (228).
5. Install the pump body (227) onto the pump base (229).
6. Install the pivot slide pin (215).
7. Insert the pump slide seal (221) and the pump slide seal (220) into the pump slide (214).
8. Insert the pump slide (214) and the slide pivot pin (215) into the pump body (227).
9. Install the outer and inner priming springs (222, 223) as an assembly into the pump body (227).
10. Install the first vane ring into the pump body (227).
11. Insert the pump slide O-ring seal (213) and pump slide seal ring (212) into the pump slide (214).
12. Insert the rotor (210) into the pump body (227).
13. Install the pump vanes (211) into the rotor (210). The pump vane must be flush with the top of the rotor.
14. Install the second vane ring (209) onto the top of the rotor (210).
15. Install the oil pump assembly (200) onto the control valve assembly (300).
16. Install the two pump body to case bolts (230) and the nine pump cover to case cover bolts (231). Tighten: Tighten the bolts to 12 N.m (106 lb in).

1. Inspect the wiring harness assembly (225) for: Cut or pinched wires Cut wire insulation Bent or broken electrical connectors Damaged terminal pins
2. Position the wire harness assembly (225) onto the control valve body (300) and the pump cover (201).
3. Mate each connector into its respective electrical component and engage the locking tabs.
4. Secure the wiring harness conduit into the retaining clip (226) on the pump cover (201).
5. Assemble the fluid temperature sensor (391) into the temperature sensor clip (390).

J 36850 Assembly Lubricant (or equivalent)

1. Inspect the control valve body cover (53) for the following conditions: Damaged or porous gasket sealing surfaces Damaged or porous casting surfaces Damaged or stripped bolt holes
2. Inspect the control valve body cover gaskets (54, 59) for damage. The gaskets are reusable if they are NOT damaged.
3. Assemble the control valve body cover inner gasket (59) to the control valve body cover (53). Use J 36850 or equivalent to retain the gasket in position.
4. Install the control valve body cover gasket (54) and control valve body cover (53) onto the case. Make sure the gaskets and electrical connector are positioned correctly.
5. Install control valve body cover bolt (56) and one control valve body cover to case stud bolt (58) in the locations shown. These bolts will properly locate the control valve body cover and gasket to the case.
6. Install the remaining bolts as indicated: Nine control valve body cover bolts (56) Four control valve body cover TORX® head bolts (57) Four control valve body cover to case stud bolts (58) Tighten: Tighten all bolts to 25 N.m (18 lb ft).

J 34094-A Thermal Element Height Gauge. See Special Tools .

Adjustment Procedure

1. Remove the thermo element plate pins (120).
2. Remove the thermo element (121) and the thermo element plate (122).
3. Use J 34094-A in order to set the height of the thermo element plate center pin (123). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
4. Install the thermo element plate (122).
5. Use J 34094-A in order to set the height of the thermo element plate pin (120) that is farthest from the accumulators. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
6. Use J 34094-A in order to set the height of the second thermo element plate pin (120). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
7. Carefully install the thermo element (121) between the two thermo element plate pins (120).
8. The V in the thermo element (121) must contact the thermo element plate (123).

1. Remove the servo piston cylinder (114) from the servo cover (104).
2. Remove the O-ring seal (113) from the servo piston cylinder (114).
3. Remove the servo piston assembly (106-111), the servo piston spring (112) and the servo exhaust screen (115) from the servo piston cylinder (114).
4. Remove the servo piston seal (107) from the servo piston (108).
5. Use a small screwdriver in order to remove the servo piston pin retaining ring (106) from the servo piston pin (111).
6. Remove the servo piston (108), the servo piston cushion spring (109) and the servo piston spring retainer (110) from the servo piston pin (111).

1. Inspect the components of the 2-1 manual band servo for the following conditions: A damaged, worn or porous servo piston cylinder (114) A damaged, worn or porous servo piston (108) A damaged or worn servo piston pin (111) A broken or damaged servo piston spring (112) A broken or damaged servo piston cushion spring (109) A damaged or plugged servo exhaust screen (115) A damaged servo cover seal (105) A damaged servo piston seal (107) A damaged servo piston cylinder O-ring seal (113)
2. Assemble the servo piston spring retainer (110), the servo piston cushion spring (109) and the servo piston (108) onto the servo piston pin (111).
3. Use a small screwdriver in order to install the servo piston pin retaining ring (106).
4. Install the servo piston seal (107) onto the servo piston (108). Lubricate the servo piston seal (107) with automatic transmission fluid.
5. Assemble the servo exhaust screen (115) and the servo piston cylinder O-ring seal (113) onto the servo piston cylinder (114). Lubricate the servo piston cylinder O-ring seal (113) with automatic transmission fluid.
6. Attach the servo piston spring (112) to the servo piston assembly (106-111).
7. Install the servo piston and spring assembly (106-112) into the servo piston cylinder assembly (113-115) and set the assemblies aside.

1. Remove the seven remaining accumulator cover bolts (131) from the accumulator assembly.
2. Remove the accumulator cover (132) and the spacer plate assembly (134) from the accumulator housing assembly (140).
3. Remove the 1-2 and 2-3 accumulator pistons (136A/B), piston pins (135A/B), outer springs (138, 142 - springs are model dependent) and cushion springs (139, 143 - springs are model dependent) from the accumulator housing (140).
4. Remove the piston oil seal rings (137A/B) from the 1-2 and 2-3 accumulator pistons (136A/B).
5. Disassemble the forward band servo and 2-1 manual band servo oil pipes (124, 125) and the lube oil pipe assembly (126-130) from the accumulator cover (132) and the 2-1 manual band servo cover (104).
6. Disassemble the lube oil pipe (126), the hose clamps (127), the hose (128), the lube oil pipe retainer (129) and the lube oil pipe and washer assembly (130).

1. Inspect the accumulator housing (140), the accumulator cover spacer plate assembly (134) and the accumulator cover (132) for the following conditions: Damaged lube and servo oil pipe holes in the accumulator cover (132) Damaged, improperly machined or porous accumulator cover (132) Bent or damaged accumulator cover spacer plate assembly (134) Stripped or damaged bolt holes in the accumulator housing (140) Damaged, worn, improperly machined or porous accumulator housing (140) Leaking, loose or missing cup plugs in the accumulator housing (140)
2. Inspect the accumulator pistons, springs, seals and pins for the following conditions: Broken or collapsed piston outer springs (138, 142) Broken or collapsed piston cushion springs (139, 143) Bent or worn accumulator piston pins (135A/B) Damaged, worn or porous accumulator pistons (136A/B) Damaged accumulator piston seals (137A/B)
3. Inspect the servo and lube oil pipe components (124-130) and the 2-1 manual band servo cover (104) for the following conditions: Damaged lube and servo oil pipe holes in the servo cover (104) Damaged, improperly machined or porous servo cover (104) Bent, plugged or damaged lube and servo oil pipes (124, 125, 126, 130) Plugged or damaged lube oil hose (128) Damaged hose clamps (127) Damaged lube oil pipe retainer (129) Missing lube oil pipe washer (130)
4. Install the 2-3 accumulator piston oil seal ring (137B) onto the 2-3 accumulator piston (136B). Lubricate the oil seal ring with automatic transmission fluid.
5. Assemble the 2-3 accumulator piston pin (135B) and piston (136B).
6. Install the 2-3 accumulator piston springs (138, 143) and piston assembly (136B) into the accumulator housing (140).
7. Install the 1-2 accumulator piston oil seal ring (137A) onto the 1-2 accumulator piston (136A). Lubricate the oil seal ring with automatic transmission fluid.
8. Assemble the 1-2 accumulator piston pin (135A) and piston (136A).
9. Install the 1-2 accumulator piston springs (139, 142) and the piston assembly (136A) into the accumulator housing (140).
10. Assemble the accumulator cover spacer plate assembly (134) and the accumulator cover (132) onto the accumulator housing (140).
11. Install seven accumulator cover bolts (131). Tighten: Tighten the accumulator cover bolts to 12 N.m (106 lb in).
12. Assemble the lube oil pipe (126), hose (128), hose clamps (127), pipe retainer (129) and pipe with washer (130).
13. Assemble the 2-1 manual band servo and forward band servo oil pipes (124, 125) into the accumulator assembly (132-140).
14. Assemble the 2-1 manual band servo and forward band servo oil pipes (124, 125) into the 2-1 manual band servo cover (104).
15. Install the lube oil pipe assembly (126-130) into the accumulator assembly (132-140).

1. Install the 2-1 manual band servo cover seal (105) into the case. Lubricate the 2-1 manual band servo cover seal (105) with automatic transmission fluid.
2. Install the 2-1 manual band servo assembly (106-116) into the case. Make sure that the 2-1 manual band servo pin engages the 2-1 manual band assembly.
3. Install the accumulator (132-140) and 2-1 manual band servo cover assembly (104) into the case.
4. Install the lube oil pipe and washer assembly (130) through the case and into the lube hole in the differential carrier internal gear.
5. Use a screwdriver in order to lock the lube oil pipe retainer (129) into the case.
6. Install the three 2-1 manual band servo cover bolts (103). Tighten: Tighten the bolts to 25 N.m (18 lb ft).
7. Install the four accumulator cover bolts (131). Tighten: Tighten the bolts to 12 N.m (106 lb in).

1. Inspect the oil pan (24) for the following conditions: A damaged sealing surface A dented or cracked bottom surface
2. Inspect the oil pan gasket (25) for the following conditions: A bent or damaged seal core A damaged rubber seal surface A damaged gasket
3. Inspect the oil pan magnet (26) for damage or misalignment
4. Clean the oil pan (24), the oil pan gasket (25) and the oil pan magnet (26) in order to remove any sediment.
5. Position the transmission so that the oil pan sealing surface is facing upward.
6. Lubricate the oil filter seal assembly (101) with transmission fluid.
7. Using a socket and a plastic mallet, gently tap the oil filter seal assembly (101) into the case (3).
8. Install the oil filter assembly (100) into the case (3).
9. Install the oil pan gasket (25) onto the case (3). The old gasket is reusable if the gasket is not damaged.
10. Install the oil pan (24) onto the case (3).
11. Install the 20 oil pan bolts (23). Tighten: Tighten the bolts to 14 N.m (10 lb ft).

1. Disassemble the servo piston return spring (22) from the forward band servo assembly.
2. Remove the servo piston oil seal ring (18) from the servo piston (16).
3. Using a small screwdriver, remove the servo pin retaining ring (15) from the servo piston apply pin (21).
4. Disassemble the servo piston (16), the servo piston cushion inner spring (65), the servo piston cushion outer spring (19), the servo cushion spring retainer (20) and the servo piston apply pin (21).

1. Inspect the forward band servo components for the following conditions: Damaged, worn or porous servo piston (16) Damaged servo piston oil seal ring (18) Damaged, worn or porous servo cover (13) Damaged servo cover seal (14) Broken or collapsed servo piston return spring (22) Broken or collapsed servo piston cushion inner spring (65) Broken or collapsed servo piston cushion outer spring (19) Damaged or worn servo piston apply pin (21)
2. Assemble the servo piston (16), the servo piston cushion outer spring (19), the servo piston cushion inner spring (65), the servo cushion spring retainer (20) and the servo piston apply pin (21).
3. Install the servo pin retaining ring (15) onto the servo piston apply pin (21).
4. Install the servo piston oil seal ring (18) onto the servo piston (16).
5. Assemble the servo piston return spring (22) onto the servo assembly.
6. Position the transmission so that the oil pan is facing up.
7. Install the servo cover seal (14) onto the servo cover (13).
8. Assemble the servo assembly (15-22) into the servo cover (13). Pivot the servo assembly (15-22) into the servo cover (13) in order to prevent the piston oil seal ring from being damaged.
9. Install the servo and cover assembly (13-22) into the case.
10. Using a long screwdriver, pry against the work bench in order to compress the forward band servo assembly (13).
11. Hold the servo assembly compressed.
12. Install the 3 forward band servo cover bolts (12). Tighten: Tighten the bolts to 12 N.m (106 lb in).
13. Remove the long screwdriver.

1. Disassemble the reverse band servo piston return spring (49) from the reverse band servo assembly.
2. Remove the servo piston oil seal ring (43) from the servo piston (44).
3. Using a small screwdriver, remove the servo pin retaining ring (42) from the servo piston apply pin (48).
4. Disassemble the servo piston (44), the servo piston cushion springs (45, 47), the servo piston cushion spring retainer (46) and servo piston apply pin (48).

1. Inspect the reverse band servo components for the following conditions: Damaged, worn or porous servo piston (44) Damaged servo piston oil seal ring (43) Damaged, worn or porous servo cover (40) Damaged servo cover O-ring seal (41) Damaged servo cover retaining ring (39) Broken or collapsed servo piston return spring (49) Broken or collapsed servo piston cushion springs (45, 47) Damaged or worn servo piston apply pin (48)
2. Assemble the servo piston (44), the servo piston cushion springs (45, 47), the servo piston cushion spring retainer (46) and the servo piston apply pin (48).
3. Install the servo pin retaining ring (42) onto the servo piston apply pin (48).
4. Install the servo piston oil seal ring (43) onto the servo piston (44).
5. Assemble the servo piston return spring (49) onto the servo assembly.
6. Position the transmission so that the oil pan is facing down.
7. Install the servo cover O-ring seal (41) onto the servo cover (40).
8. Install the servo and cover assembly (40-49) into the case.
9. Use a long screwdriver in order to depress the reverse band servo cover (40) by prying against the transmission holding fixture.
10. Hold the reverse band servo assembly compressed.
11. Use a small screwdriver in order to install the reverse band servo cover retaining ring (39).
12. Remove the long screwdriver.

1. J 36850 Assembly Lubricant (or equivalent)
2. J 44472 End Play Checking Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Position the transaxle so that the case side cover is facing down.
2. Install the final drive sun gear shaft (689).
3. Use J 36850 or equivalent in order to retain the parking gear thrust bearing (695) to the parking gear (696). Install the parking gear thrust bearing (695) and the parking gear (696).
4. Install the final drive sun gear (697).
5. Install the gauge bar (1) onto the case mounting surface.
6. Install J 44472 (2) onto the transmission. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Tighten: Tighten J 44472 to remove end play. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) . Hand tighten only.
7. Measure the distance from the case mounting surface, bottom of the gauge bar (1) to the top of the final drive sun gear (697). This measurement is dimension A, refer to «Transfer Case Selective Washer Specifications»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__transfer-case-selective-washer-specifications) .
8. Remove the gauge bar (1) and J 44472 (2). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
9. Install the gauge bar onto the carrier.
10. Measure the distance from the bottom of the gauge bar to the transfer case. This measurement is Dimension B1.
11. Measure the distance from the bottom of the gauge bar to the thrust bearing (1). This measurement is Dimension B2.
12. Subtract Dimension B2 from Dimension B1. This Dimension is B. Refer to «Transfer Case Selective Washer Specifications»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__transfer-case-selective-washer-specifications) .
13. Remove the gauge bar from the transfer case.
14. Remove the final drive sun gear (697).
15. Refer to «Transfer Case Selective Washer Specifications»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__transfer-case-selective-washer-specifications) . Install the selective washer (902).
16. Install the final drive sun gear (697).

J 36850 Assembly Lubricant (or equivalent)

1. Install the case extension seal (8) using J 36850 in order to retain.
2. Line up the notch (1) to the hole in the case and install the oil dam (901).
3. Install the transfer case lower brace (906).
4. Install the transfer case lower brace bolts (903). Hand tighten.
5. Install the transfer case assembly (908) onto the transmission case (3).
6. Install the 5 transfer case to case bolts (907, 909, 910).
7. Torque the bolts in the following sequence: Tighten 2 transfer case bolts (1, 2): Tighten: First pass 35 N.m (26 lb ft) Final Pass an additional 160 degrees
8. Tighten 1 transfer case bolt (3): Tighten: First pass 35 N.m (26 lb ft) Final Pass an additional 70 degrees
9. Tighten 2 transfer case bolts (4, 5): Tighten: Tighten transfer case bolts (4, 5) to 40 N.m (30 lb ft).
10. Install the transfer case side brace (905) to case.
11. Install the transfer case side brace to case bolts (903). Hand tighten the bolts.
12. Torque the bolts in the following sequence (1, 2, 3, 4, 5). Tighten: Tighten the transfer case side brace bolts to 31 N.m (23 lb ft).
13. Install the transfer case lower brace to case bolt (904). Tighten: Tighten the transfer case lower brace bolt to 56 N.m (42 lb ft).
14. Tighten the transfer case lower brace to case bolts (903). Tighten: Tighten the transfer case lower brace bolts to 31 N.m (23 lb ft).

1. Inspect the output shaft (510) for: Damaged bushing journals Stripped splines Snap ring groove damage
2. Affix the outboard drive shaft retaining ring (509) and the inboard drive shaft retaining ring (509) onto the output shaft (510).
3. Rotate the transmission so that the oil pan flange faces downward.
4. Carefully install the output shaft (510) into the transmission. Extend the shaft through the differential side gear.

1. J 28664-B Transmission Holding Fixture. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
2. J 3289-20 Holding Fixture Base
3. J44465 Holding Fixture Adapter. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. Remove the pin from J 3289-20 .
2. Remove the transmission and J 28664-B from J 3289-20 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
3. Remove J 28664-B from the transmission. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .
4. Remove J44465 from J 28664-B . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-overhaul__special-tools) .

1. J 8001 Dial Indicator Set
2. J 26900-13 Magnetic Indicator Base
3. J 35138 Torque Converter End Play Checking Tool

1. Position the torque converter (1) on the bench with the flywheel lugs facing down.
2. Install J 26900-13 , J 35138 and J 8001 onto the torque converter (1).
3. Set the dial indicator to 0.
4. Lift J 35138 and note the dial indicator reading: The torque converter end play should be 0.5 mm (0.020 in) or less If the end play is too high, replace the torque converter (1)
5. Inspect and replace the torque converter (1) for the following conditions: Overheated (torque converter will be blue in color) Leaking at the weld areas A damaged torque converter pilot Evidence of metal particles in the converter, the oil cooler or the cooler pipes A damaged torque converter stator, a damaged pump or a damaged turbine A damaged or worn torque converter bushing (2) Contaminated automatic transmission fluid due to engine coolant
6. Inspect the torque converter for stripped bolt hole threads. If found, repair the torque converter.

J 36850 Assembly Lubricant (or equivalent)

1. Apply J 36850 or equivalent to a new turbine shaft O-ring seal (520).
2. Apply J 36850 or equivalent to the turbine shaft (518) splines.
3. Install the turbine shaft O-ring seal (520) onto the turbine shaft (518).
4. Install the torque converter assembly (1).

Park or Neutral - Engine Running (Park - Without Touch Activated Power)

When the gear selector lever is in the PARK (P) position and the engine is running, fluid is drawn into the oil pump and line pressure is then directed to the following control devices

Pressure Regulator Valve (313)

Regulates pump output (line pressure) in response to torque signal fluid pressure acting on the boost valve, spring force and line pressure acting on the end of the valve. Line pressure is directed to the manual valve, 3 accumulator valves, torque signal regulator valve, pressure relief valve, TCC regulator valve, #10 ball check valve and 2-3 shift valve, 3-2 manual downshift valve, 3-4 shift valve, 2-3 shift solenoid valve, #3 ball check valve and input clutch and actuator feed limit valve.

Actuator Feed Limit Valve (414)

Line pressure is routed to the valve and limited to a maximum pressure as it passes through the valve and enters the actuator feed circuit. Actuator feed is then routed to the pressure control solenoid valve and into the 1-2, 3-4 shift solenoid valve.

Pressure Control (PC) Solenoid Valve (322)

Controlled by the PCM, the PC solenoid valve regulates filtered actuator feed pressure entering the torque signal circuit. Torque signal fluid is then routed to the pressure regulator valve, the 1-2, 2-3 and 3-4 accumulator valves.

Torque Signal Regulator Valve (321)

Regulates line pressure into the torque signal fluid circuit. This regulation is controlled by filtered actuator feed fluid pressure from the PC solenoid valve.

Line Pressure Relief Valve (324)

Exhausts line pressure above 1,690-2,480 kPa (450-360 psi).

Manual Valve (404)

The manual valve is moved to the NEUTRAL position and blocks line pressure from entering the Reverse fluid circuit. The reverse fluid circuit is opened to an exhaust at the manual valve.

Transmission Fluid Pressure (TFP) Manual Valve Position Switch Assembly (34)

The automatic transmission fluid pressure (TFP) switch is attached to the valve body and consists of one fluid pressure switch that monitors TCC release pressure. This switch is used as a diagnostic tool to confirm that the TCC is actually off when it has been commanded off by the PCM.

The TCC release switch is a normally closed pressure switch. A normally closed switch allows current to flow from the positive contact through the switch to ground when no fluid is present. Fluid pressure moves the diaphragm to disconnect the positive and ground contacts, opening the switch and stopping current flow. This change in switch state electronically signals the PCM that the TCC is released.

1-2, 3-4 Shift Solenoid Valve (315A)

Controlled by the powertrain control module (PCM), the 1-2, 3-4 shift solenoid (SS) valve is energized (On) in PARK range. Actuator feed pressure moves the 1-2 shift valve (318) against spring pressure and directs line fluid into the 1-2, 3-4 signal passage. 1-2, 3-4 signal fluid is then directed to the 3-4 shift valve (362).

2-3 Shift Solenoid Valve (315B)

Controlled by the powertrain control module (PCM), the 2-3 shift solenoid (SS) valve is energized (On) in PARK range and directs line pressure into the 2-3 signal passage. 2-3 signal fluid directed to the 4-3 manual downshift valve (360) and moves the valve against spring pressure and also the 3-2 manual downshift valve (356).

1-2 Shift Valve (318)

1-2 signal fluid pressure holds the valve in the downshift position against spring force.

2-3 Shift Valve (357)

In PARK range, line pressure passes through the 2-3 shift valve (357) and line pressure feeds the input clutch feed passage. Line pressure then passes through the 3-4 shift valve (362) and around the #3 ball check valve (372), located in the case cover) in order to apply the input clutch. Although the input clutch is applied and the input sprag is holding, these conditions are not effective because neither the forward band assembly (688) nor the reverse band assembly (615) is applied.

1-2, 2-3 and 3-4 Accumulator Valves (350, 344, 341)

Line pressure is regulated into accumulator fluid pressure. This regulation is basically controlled by torque signal fluid pressure acting on the end of the valve.

1-2, 2-3 and 3-4 Accumulator Assemblies

Accumulator fluid is routed to each of the accumulator assemblies in preparation for upshifts. The fluid routed to the 1-2, 2-3 and 3-4 accumulators is orificed.

Pressure Regulator Valve (313) (Torque Converter/Cooler and Lube Circuits)

Line pressure at the valve enters the converter feed circuit which is then routed to the TCC control valve.

TCC Control Valve (335)

Spring pressure holds the valve in the released position. Converter feed fluid is directed to the release circuit. Release fluid seats #1 ball check valve and feeds the TCC blow-off. Release fluid feeds the TCC on the cover side of the pressure plate, exits the TCC through the apply circuit, then feeds the cooler circuit at the TCC control valve. Cooler fluid passes through the ball check valve, through the cooler, then returns to the transmission and feeds the rear lube circuit. A front lube circuit is fed from orificed line pressure.

Scheme 142

Park or Neutral - Engine Running (Park - With Touch Activated Power)

When the gear selector lever is in the PARK (P) position and the engine is running, fluid is drawn into the oil pump and line pressure is then directed to the following control devices

Regulates pump output (line pressure) in response to torque signal fluid pressure acting on the boost valve, spring force and line pressure acting on the end of the valve. Line pressure is directed to the manual valve, 3 accumulator valves, torque signal regulator valve, pressure relief valve, TCC regulator valve, #10 ball check valve and 2-3 shift valve, 3-2 manual downshift valve, 3-4 shift valve, 2-3 shift solenoid valve, #3 ball check valve and input clutch and actuator feed limit valve.

Line pressure is routed to the valve and limited to a maximum pressure as it passes through the valve and enters the actuator feed circuit. Actuator feed is then routed to the pressure control solenoid valve and into the 1-2, 3-4 shift solenoid valve.

Controlled by the PCM, the PC solenoid valve regulates filtered actuator feed pressure entering the torque signal circuit. Torque signal fluid is then routed to the pressure regulator valve, the 1-2, 2-3 and 3-4 accumulator valves.

Regulates line pressure into the torque signal fluid circuit. This regulation is controlled by filtered actuator feed fluid pressure from the PC solenoid valve.

Exhausts line pressure above 1,690-2,480 kPa (450-360 psi).

The manual valve is moved to the NEUTRAL position and blocks line pressure from entering the Reverse fluid circuit. The reverse fluid circuit is opened to an exhaust at the manual valve.

The automatic transmission fluid pressure (TFP) switch is attached to the valve body and consists of one fluid pressure switch that monitors TCC release pressure. This switch is used as a diagnostic tool to confirm that the TCC is actually off when it has been commanded off by the PCM.

The TCC release switch is a normally closed pressure switch. A normally closed switch allows current to flow from the positive contact through the switch to ground when no fluid is present. Fluid pressure moves the diaphragm to disconnect the positive and ground contacts, opening the switch and stopping current flow. This change in switch state electronically signals the PCM that the TCC is released.

Controlled by the powertrain control module (PCM), the 1-2, 3-4 shift solenoid (SS) valve is energized (On) in PARK range. Actuator feed pressure moves the 1-2 shift valve (318) against spring pressure and directs line fluid into the 1-2, 3-4 signal passage. 1-2, 3-4 signal fluid is then directed to the 3-4 shift valve (362).

Controlled by the powertrain control module (PCM), the 2-3 shift solenoid (SS) valve is energized (On) in PARK range and directs line pressure into the 2-3 signal passage. 2-3 signal fluid directed to the 4-3 manual downshift valve (360) and moves the valve against spring pressure and also the 3-2 manual downshift valve (356).

1-2 signal fluid pressure holds the valve in the downshift position against spring force.

In PARK range, line pressure passes through the 2-3 shift valve (357) and line pressure feeds the input clutch feed passage. Line pressure then passes through the 3-4 shift valve (362) and around the #3 ball check valve (372), located in the case cover) in order to apply the input clutch. Although the input clutch is applied and the input sprag is holding, these conditions are not effective because neither the forward band assembly (688) nor the reverse band assembly (615) is applied.

Line pressure is regulated into accumulator fluid pressure. This regulation is basically controlled by torque signal fluid pressure acting on the end of the valve.

Accumulator fluid is routed to each of the accumulator assemblies in preparation for upshifts. The fluid routed to the 1-2, 2-3 and 3-4 accumulators is orificed.

Line pressure at the valve enters the converter feed circuit which is then routed to the TCC control valve.

Spring pressure holds the valve in the released position. Converter feed fluid is directed to the release circuit. Release fluid seats #1 ball check valve and feeds the TCC blow-off. Release fluid feeds the TCC on the cover side of the pressure plate, exits the TCC through the apply circuit, then feeds the cooler circuit at the TCC control valve. Cooler fluid passes through the ball check valve, through the cooler, then returns to the transmission and feeds the rear lube circuit. A front lube circuit is fed from orificed line pressure.

Scheme 143

Park or Neutral - Engine Running (Neutral-Without Touch Activated Power)

When the gear selector lever is moved from the REVERSE position to the NEUTRAL position the following changes occur to the hydraulic and electrical systems.

The manual valve is moved to the NEUTRAL position and blocks line pressure from entering the Reverse fluid circuit. The reverse fluid circuit is opened to an exhaust at the manual valve.

Reverse Band Assembly (615)

Reverse fluid exhausts from the reverse servo, the #5 ball check valve unseats, allowing reverse servo fluid to quickly exhaust at the manual valve and the reverse band releases, shifting the transmission into NEUTRAL.

Line pressure at the valve enters the converter feed circuit which is then routed to the TCC control valve.

Spring pressure holds the valve in the released position. Converter feed fluid is directed to the release circuit. Release fluid seats #1 ball check valve and feeds the TCC blow-off. Release fluid feeds the TCC on the cover side of the pressure plate, exits the TCC through the apply circuit, then feeds the cooler circuit at the TCC control valve. Cooler fluid passes through the ball check valve, through the cooler, then returns to the transmission and feeds the rear lube circuit. A front lube circuit is fed from orificed line pressure.

Scheme 144

Park or Neutral - Engine Running (Neutral - With Touch Activated Power)

When the gear selector lever is moved from the REVERSE position to the NEUTRAL position the following changes occur to the hydraulic and electrical systems.

The manual valve is moved to the NEUTRAL position and blocks line pressure from entering the Reverse fluid circuit. The reverse fluid circuit is opened to an exhaust at the manual valve.

Reverse fluid exhausts from the reverse servo, the #5 ball check valve unseats, allowing reverse servo fluid to quickly exhaust at the manual valve and the reverse band releases, shifting the transmission into NEUTRAL.

Line pressure at the valve enters the converter feed circuit which is then routed to the TCC control valve.

Spring pressure holds the valve in the released position. Converter feed fluid is directed to the release circuit. Release fluid seats #1 ball check valve and feeds the TCC blow-off. Release fluid feeds the TCC on the cover side of the pressure plate, exits the TCC through the apply circuit, then feeds the cooler circuit at the TCC control valve. Cooler fluid passes through the ball check valve, through the cooler, then returns to the transmission and feeds the rear lube circuit. A front lube circuit is fed from orificed line pressure.

Scheme 145

Reverse (Without Touch Activated Power)

When the gear selector lever is moved to the REVERSE (R) position (from the PARK position) the following changes occur in the transmission's hydraulic and electrical systems.

Increases (or decreases) in line pressure is primarily influenced by changes in the throttle position as a result of the changing operating conditions of the vehicle.

Is moved manually to the right through the gear selector lever and allows line pressure to enter the reverse fluid passage through the PRN fluid passage.

Number 5 Ball Check Valve (373)

Located in the control valve body, (300), it blocks the reverse servo feed passage forcing reverse fluid through an orifice in the spacer plate (370) into the reverse servo passage. When the manual valve (404) is moved out of reverse, the ball check valve unseats allowing reverse servo fluid to exhaust through the ball seat instead of through the orifice.

Reverse Servo Assembly (39-40)

Applies the reverse band (615) in response to reverse servo fluid pressure feeding into the servo cover (40) side of the reverse servo piston (44).

Wraps around the second clutch housing (617) and holds the input carrier (672), through the reverse reaction drum (669), allowing the vehicle to move in reverse.

Input Clutch

Remains applied from PARK to REVERSE and becomes effective as the reverse band applies. The input sprag holds at this time.

Line pressure at the valve enters the converter feed circuit which is then routed to the TCC control valve.

Spring pressure holds the valve in the released position. Converter feed fluid is directed to the release circuit. Release fluid seats #1 ball check valve and feeds the TCC blow-off. Release fluid feeds the TCC on the cover side of the pressure plate, exits the TCC through the apply circuit, then feeds the cooler circuit at the TCC control valve. Cooler fluid passes through the ball check valve, through the cooler, then returns to the transmission and feeds the rear lube circuit. A front lube circuit is fed from orificed line pressure.

Scheme 146

Reverse (With Touch Activated Power)

When the gear selector lever is moved to the REVERSE (R) position (from the PARK position) the following changes occur in the transmission's hydraulic and electrical systems.

Increases (or decreases) in line pressure is primarily influenced by changes in the throttle position as a result of the changing operating conditions of the vehicle.

Is moved manually to the right through the gear selector lever and allows line pressure to enter the reverse fluid passage through the PRN fluid passage.

Located in the control valve body, (300), it blocks the reverse servo feed passage forcing reverse fluid through an orifice in the spacer plate (370) into the reverse servo passage. When the manual valve (404) is moved out of reverse, the ball check valve unseats allowing reverse servo fluid to exhaust through the ball seat instead of through the orifice.

Applies the reverse band (615) in response to reverse servo fluid pressure feeding into the servo cover (40) side of the reverse servo piston (44).

Wraps around the second clutch housing (617) and holds the input carrier (672), through the reverse reaction drum (669), allowing the vehicle to move in reverse.

Remains applied from PARK to REVERSE and becomes effective as the reverse band applies. The input sprag holds at this time.

Line pressure at the valve enters the converter feed circuit which is then routed to the TCC control valve.

Spring pressure holds the valve in the released position. Converter feed fluid is directed to the release circuit. Release fluid seats #1 ball check valve and feeds the TCC blow-off. Release fluid feeds the TCC on the cover side of the pressure plate, exits the TCC through the apply circuit, then feeds the cooler circuit at the TCC control valve. Cooler fluid passes through the ball check valve, through the cooler, then returns to the transmission and feeds the rear lube circuit. A front lube circuit is fed from orificed line pressure.

Scheme 147

Overdrive Range, First Gear (Without Touch Activated Power)

When the gear selector lever is moved to the Overdrive (D) position from the NEUTRAL (N) position the following changes occur to shift the transmission into Overdrive Range - First Gear.

Is moved by the gear selector lever and allows line pressure to enter the D4 passage.

Number 6 Ball Check Valve (372)

Located in the control valve body (300), blocks forward servo apply passage forcing D4 pressure to the forward servo boost valve (367), the forward servo feed orifice on the spacer plate (370). When the manual valve (404) is moved from DRIVE to PARK or NEUTRAL, the ball check valve unseats to allow for a quick exhaust of servo apply fluid and release of the forward band assembly (688).

Forward Servo Assembly (15-22)

Applies and holds the forward band (688) during all forward gear drive ranges.

Forward Band Assembly (688)

Wraps around and holds the 1-2 support outer race (687) during all forward gear drive ranges.

1-2 Shift Solenoid (SS) Valve (315A)

Energized (ON) by the PCM, high pressure in the 1-2, 3-4 signal fluid circuit holds the 12 shift valve in the downshift position. 1-2, 3-4 signal fluid also is routed to the 3-4 shift valve, but is not effective.

2-3 Shift Solenoid (SS) Valve (315B)

Energized (ON) by the PCM, high pressure in the 2-3 signal fluid circuit holds the 2-3 and 3-4 shift valves in the downshift position.

Remains applied from NEUTRAL to DRIVE and becomes effective as the forward band applies. The input sprag holds at this time.

1-2 Support Roller Clutch

The 1-2 support roller clutch holds when the forward band is applied.

Scheme 148

Overdrive Range, First Gear (With Touch Activated Power)

When the gear selector lever is moved to the Overdrive (D) position from the NEUTRAL (N) position the following changes occur to shift the transmission into Overdrive Range - First Gear.

Is moved by the gear selector lever and allows line pressure to enter the D4 passage.

Located in the control valve body (300), blocks forward servo apply passage forcing D4 pressure to the forward servo boost valve (367), the forward servo feed orifice on the spacer plate (370). When the manual valve (404) is moved from DRIVE to PARK or NEUTRAL, the ball check valve unseats to allow for a quick exhaust of servo apply fluid and release of the forward band assembly (688).

Applies and holds the forward band (688) during all forward gear drive ranges.

Wraps around and holds the 1-2 support outer race (687) during all forward gear drive ranges.

Energized (ON) by the PCM, high pressure in the 1-2, 3-4 signal fluid circuit holds the 12 shift valve in the downshift position. 1-2, 3-4 signal fluid also is routed to the 3-4 shift valve, but is not effective.

Energized (ON) by the PCM, high pressure in the 2-3 signal fluid circuit holds the 2-3 and 3-4 shift valves in the downshift position.

Remains applied from NEUTRAL to DRIVE and becomes effective as the forward band applies. The input sprag holds at this time.

The 1-2 support roller clutch holds when the forward band is applied.

Scheme 149

Overdrive Range, Second Gear (Without Touch Activated Power)

As the speed of the vehicle increases, the powertrain control module (PCM) receives input signals from various engine and transmission sensors. The PCM uses this data to de-energize 1-2, 3-4 shift solenoid valve in order to shift the transmission into second gear at the appropriate time.

1-2, 3-4 Shift Solenoid (SS) Valve (315A)

De-energized (OFF) by the PCM, it exhausts 1-2, 3-4 signal fluid through the solenoid thereby creating a low 1-2, 3-4 signal fluid pressure in the circuit. Low 1-2, 3-4 signal fluid pressure allows the 1-2 shift valve to move to the upshift position.

With the 1-2, 3-4 SS valve OFF, spring pressure moves the valve allowing D4 pressure to enter the 2nd fluid passage directing 2nd fluid to the Number 2 ball check valve.

Number 2 Ball Check Valve (372)

Located in the case cover (400), 2nd fluid seats the ball check valve and is forced through an orifice into the 2nd clutch passage to apply the 2nd clutch.

Second Clutch

2nd clutch fluid pressure applies the Second clutch to shift the transmission into Overdrive Range - Second gear.

Remains applied, but is now ineffective.

Input Sprag Clutch

Overruns as the second clutch applies.

Forward Band

Remains applied.

Continues to hold while the forward band is applied.

1-2 Accumulator

2nd clutch fluid is also routed to the 1-2 accumulator piston. 2nd Clutch fluid pressure, in addition to 1-2 assist spring force, moves the piston against spring force and 1-2 accumulator feed fluid pressure. This action absorbs initial 2nd clutch fluid pressure to cushion the second clutch apply. The movement of the 1-2 accumulator piston forces some accumulator fluid out of the accumulator.

1-2 Accumulator Valve

1-2 accumulator feed fluid forced from the 1-2 accumulator is routed back to the 1-2 accumulator valve. This pressure forces the 1-2 accumulator valve against spring force and the torque signal fluid pressure to regulate the exhaust of excess accumulator fluid. This regulation provides additional control for the second clutch apply.

TCC Control Pulse Width Modulated (PWM) Solenoid Valve

2nd fluid is routed to the TCC control PWM solenoid. Under normal operating conditions the TCC control PWM solenoid is OFF in Second gear and blocks 2nd fluid from entering the TCC signal fluid circuit.

Torque Converter Clutch

With the TCC control PWM solenoid OFF the converter clutch is released in Second gear. Under normal operating conditions the TCC is released in Second gear. However, TCC apply could vary depending on vehicle application and may be calibrated to apply in Overdrive Range - Second Gear.

Transmission Fluid Pressure (TFP) Manual Valve Position Switch

Release fluid pressure routed to the TFP manual valve position switch signals the PCM that the TCC is released.

Scheme 150

Overdrive Range, Second Gear (With Touch Activated Power)

As the speed of the vehicle increases, the powertrain control module (PCM) receives input signals from various engine and transmission sensors. The PCM uses this data to de-energize 1-2, 3-4 shift solenoid valve in order to shift the transmission into second gear at the appropriate time.

De-energized (OFF) by the PCM, it exhausts 1-2, 3-4 signal fluid through the solenoid thereby creating a low 1-2, 3-4 signal fluid pressure in the circuit. Low 1-2, 3-4 signal fluid pressure allows the 1-2 shift valve to move to the upshift position.

With the 1-2, 3-4 SS valve OFF, spring pressure moves the valve allowing D4 pressure to enter the 2nd fluid passage directing 2nd fluid to the Number 2 ball check valve.

Located in the case cover (400), 2nd fluid seats the ball check valve and is forced through an orifice into the 2nd clutch passage to apply the 2nd clutch.

2nd clutch fluid pressure applies the Second clutch to shift the transmission into Overdrive Range - Second gear.

Remains applied, but is now ineffective.

Overruns as the second clutch applies.

Remains applied.

Continues to hold while the forward band is applied.

2nd clutch fluid is also routed to the 1-2 accumulator piston. 2nd Clutch fluid pressure, in addition to 1-2 assist spring force, moves the piston against spring force and 1-2 accumulator feed fluid pressure. This action absorbs initial 2nd clutch fluid pressure to cushion the second clutch apply. The movement of the 1-2 accumulator piston forces some accumulator fluid out of the accumulator.

1-2 accumulator feed fluid forced from the 1-2 accumulator is routed back to the 1-2 accumulator valve. This pressure forces the 1-2 accumulator valve against spring force and the torque signal fluid pressure to regulate the exhaust of excess accumulator fluid. This regulation provides additional control for the second clutch apply.

2nd fluid is routed to the TCC control PWM solenoid. Under normal operating conditions the TCC control PWM solenoid is OFF in Second gear and blocks 2nd fluid from entering the TCC signal fluid circuit.

With the TCC control PWM solenoid OFF the converter clutch is released in Second gear. Under normal operating conditions the TCC is released in Second gear. However, TCC apply could vary depending on vehicle application and may be calibrated to apply in Overdrive Range - Second Gear.

Release fluid pressure routed to the TFP manual valve position switch signals the PCM that the TCC is released.

Scheme 151

Overdrive Range, Third Gear - Torque Converter Clutch Not Applied (Without Touch Activated Power)

As the speed of the vehicle increases, the powertrain control module (PCM) receives input signals from various engine and transmission sensors. The PCM uses this data to energize the 2-3 shift solenoid (SS) valve in order to shift the transmission into third gear at the appropriate time.

2-3 Shift Solenoid (SS) Valve (315)

De-energizes, allowing 2-3 signal fluid to exhaust through the solenoid. Spring pressure forces the 4-3 manual downshift valve (360) to move while line pressure moves the 2-3 shift valve (357) and 3-2 manual downshift valve (356).

Number 9 Ball Check Valve (372)

Located in the control valve body (300), forces 3rd fluid through a feed orifice and into the 3rd clutch passage.

Number 4 Ball Check Valve (372)

Located in the case cover (400), directs 3rd clutch fluid into the 3rd clutch/lo-1st passage to apply the 3rd clutch.

When shifted, allows D4 fluid to enter the 3rd passage to stroke the 2-3 accumulator piston (136) and apply the 3rd clutch. The 2-3 shift valve also allows input clutch apply fluid to exhaust into the D3 passage and out at the manual valve (404). And provides 2-3 off signal fluid to the 1-2 shift valve.

Third Clutch

3rd clutch/lo-1st fluid pressure applies the third clutch to shift the transmission into Third gear.

Third Roller Clutch

Holds as third clutch applies.

In third gear, the input clutch is released allowing input clutch apply fluid to exhaust through the 3-4 shift valve (362) into the input clutch feed passage. At the 2-3 shift valve (357), exhausting input clutch apply fluid is directed into the D3 passage and out the manual valve (404).

Remains applied, but is ineffective.

Overruns as third clutch is applied.

2-3 Accumulator

Third clutch feed fluid is also routed to the 2-3 accumulator piston. This fluid pressure moves the piston against spring force and 2-3 accumulator feed fluid pressure. This action absorbs initial third clutch fluid pressure to cushion the third clutch apply. The movement of the 2-3 accumulator piston forces some accumulator fluid out of the accumulator.

2-3 Accumulator Valve

Excess 2-3 accumulator feed fluid is routed back to the 2-3 accumulator valve. This fluid pressure moves the accumulator valve against spring force and torque signal fluid pressure to regulate the exhaust of excess accumulator fluid. This regulation provides additional control for the third clutch apply.

TCC apply could vary depending on vehicle application and may be calibrated to apply in Overdrive Range - Third Gear.

Release fluid pressure routed to the TFP manual valve position switch signals the PCM that the TCC is released.

Scheme 152

Overdrive Range, Third Gear - Torque Converter Clutch Not Applied (With Touch Activated Power)

As the speed of the vehicle increases, the powertrain control module (PCM) receives input signals from various engine and transmission sensors. The PCM uses this data to energize the 2-3 shift solenoid (SS) valve in order to shift the transmission into third gear at the appropriate time.

De-energizes, allowing 2-3 signal fluid to exhaust through the solenoid. Spring pressure forces the 4-3 manual downshift valve (360) to move while line pressure moves the 2-3 shift valve (357) and 3-2 manual downshift valve (356).

Located in the control valve body (300), forces 3rd fluid through a feed orifice and into the 3rd clutch passage.

Located in the case cover (400), directs 3rd clutch fluid into the 3rd clutch/lo-1st passage to apply the 3rd clutch.

When shifted, allows D4 fluid to enter the 3rd passage to stroke the 2-3 accumulator piston (136) and apply the 3rd clutch. The 2-3 shift valve also allows input clutch apply fluid to exhaust into the D3 passage and out at the manual valve (404). And provides 2-3 off signal fluid to the 1-2 shift valve.

3rd clutch/lo-1st fluid pressure applies the third clutch to shift the transmission into Third gear.

Holds as third clutch applies.

In third gear, the input clutch is released allowing input clutch apply fluid to exhaust through the 3-4 shift valve (362) into the input clutch feed passage. At the 2-3 shift valve (357), exhausting input clutch apply fluid is directed into the D3 passage and out the manual valve (404).

Remains applied, but is ineffective.

Overruns as third clutch is applied.

Third clutch feed fluid is also routed to the 2-3 accumulator piston. This fluid pressure moves the piston against spring force and 2-3 accumulator feed fluid pressure. This action absorbs initial third clutch fluid pressure to cushion the third clutch apply. The movement of the 2-3 accumulator piston forces some accumulator fluid out of the accumulator.

Excess 2-3 accumulator feed fluid is routed back to the 2-3 accumulator valve. This fluid pressure moves the accumulator valve against spring force and torque signal fluid pressure to regulate the exhaust of excess accumulator fluid. This regulation provides additional control for the third clutch apply.

TCC apply could vary depending on vehicle application and may be calibrated to apply in Overdrive Range - Third Gear.

Release fluid pressure routed to the TFP manual valve position switch signals the PCM that the TCC is released.

Scheme 153

Overdrive Range, Fourth Gear - Torque Converter Clutch Not Applied (Without Touch Activated Power)

As the speed of the vehicle continues to increase, the powertrain control module (PCM) monitors the input signals from various engine and transmission sensors. The PCM uses this data to energize the 1-2, 3-4 shift solenoid (SS) valve in order to shift the transmission into fourth gear at the appropriate time.

1-2, 3-4 Shift Solenoid (SS) Valve (315)

Energizes to prevent fluid from exhausting out of the line passage and the 1-2, 3-4 signal fluid passage.

Is held against 1-2, 3-4 signal fluid pressure by spring pressure and 2-3 off signal fluid pressure at the end of the valve.

3-4 Shift Valve (362)

When 1-2, 3-4 signal fluid shifts the 3-4 shift valve against spring force, it allows 3rd fluid to enter the 4th clutch fluid passage. 4th clutch fluid is forced through a feed orifice before stroking the 3-4 accumulator piston (428) and applying the fourth clutch.

Fourth Clutch

4th Clutch fluid pressure applies the fourth clutch to shift the transmission to fourth gear.

Remains applied, but is ineffective.

Overruns as fourth clutch is applied. In third gear, the input clutch is released allowing input clutch apply fluid to exhaust through the 3-4 shift valve (362) into the input clutch feed passage. At the 2-3 shift valve (357), exhausting input clutch apply fluid is directed into the D3 passage and out the manual valve (404).

Remains applied.

Remains applied, but is ineffective.

Continues to overrun.

3-4 Accumulator

4th clutch fluid is also routed to the 3-4 accumulator piston. 4th clutch fluid pressure moves the piston against spring force and 3-4 accumulator feed fluid pressure. This action absorbs initial 4th clutch fluid pressure to cushion the 4th clutch apply. The movement of the 3-4 accumulator piston forces some accumulator fluid out of the accumulator.

3-4 Accumulator Valve

Excess 3-4 accumulator feed fluid is routed back to the 3-4 accumulator valve. This fluid pressure moves the accumulator valve against spring force and torque signal fluid pressure to regulate the exhaust of excess accumulator fluid. This regulation provides additional control for the fourth clutch apply.

TCC apply could vary depending on vehicle application and may be calibrated to apply in Overdrive Range - Fourth Gear.

Release fluid pressure routed to the TFP manual valve position switch signals the PCM that the TCC is released.

Scheme 154

Overdrive Range, Fourth Gear - Torque Converter Clutch Not Applied (With Touch Activated Power)

As the speed of the vehicle continues to increase, the powertrain control module (PCM) monitors the input signals from various engine and transmission sensors. The PCM uses this data to energize the 1-2, 3-4 shift solenoid (SS) valve in order to shift the transmission into fourth gear at the appropriate time.

Energizes to prevent fluid from exhausting out of the line passage and the 1-2, 3-4 signal fluid passage.

Is held against 1-2, 3-4 signal fluid pressure by spring pressure and 2-3 off signal fluid pressure at the end of the valve.

When 1-2, 3-4 signal fluid shifts the 3-4 shift valve against spring force, it allows 3rd fluid to enter the 4th clutch fluid passage. 4th clutch fluid is forced through a feed orifice before stroking the 3-4 accumulator piston (428) and applying the fourth clutch.

4th Clutch fluid pressure applies the fourth clutch to shift the transmission to fourth gear.

Remains applied, but is ineffective.

Overruns as fourth clutch is applied. In third gear, the input clutch is released allowing input clutch apply fluid to exhaust through the 3-4 shift valve (362) into the input clutch feed passage. At the 2-3 shift valve (357), exhausting input clutch apply fluid is directed into the D3 passage and out the manual valve (404).

Remains applied.

Remains applied, but is ineffective.

Continues to overrun.

4th clutch fluid is also routed to the 3-4 accumulator piston. 4th clutch fluid pressure moves the piston against spring force and 3-4 accumulator feed fluid pressure. This action absorbs initial 4th clutch fluid pressure to cushion the 4th clutch apply. The movement of the 3-4 accumulator piston forces some accumulator fluid out of the accumulator.

Excess 3-4 accumulator feed fluid is routed back to the 3-4 accumulator valve. This fluid pressure moves the accumulator valve against spring force and torque signal fluid pressure to regulate the exhaust of excess accumulator fluid. This regulation provides additional control for the fourth clutch apply.

TCC apply could vary depending on vehicle application and may be calibrated to apply in Overdrive Range - Fourth Gear.

Release fluid pressure routed to the TFP manual valve position switch signals the PCM that the TCC is released.

Scheme 155

Overdrive Range, Fourth Gear - Torque Converter Clutch Applied (Without Touch Activated Power)

The torque converter clutch applies during third or fourth gear operation after the powertrain control module (PCM) receives the appropriate input signals to energize the TCC control (PWM) solenoid. To apply the torque converter clutch, the following changes take place in the electrical and hydraulic systems

TCC Control (PWM) Solenoid

When conditions are appropriate, the PCM energizes the TCC control (PWM) solenoid to initiate the TCC apply. The solenoid is pulse width modulated (PWM) to provide a smooth TCC apply (refer to the appropriate electrical controls information for a detailed description of the TCC control (PWM) solenoid operation). When energized, the TCC control (PWM) solenoid modulates 2nd fluid into the TCC signal (PWM) fluid circuit.

TCC Regulator Valve

TCC signal (PWM) fluid pressure modulates the valve against spring force and TCC regulated apply fluid pressure. This action directs line pressure into the TCC regulated apply fluid circuit in relation to vehicle operating conditions.

TCC Control Valve

Modulated TCC signal (PWM) fluid pressure moves the valve against spring force in relation to vehicle operating conditions. This action regulates TCC regulated apply fluid into the TCC apply fluid circuit. At the same time, the TCC release fluid circuit is opened to an orificed exhaust. In this position the valve directs converter feed fluid to feed the cooler fluid circuit.

TCC apply fluid is routed to the torque converter clutch at the same time TCC release fluid exhausts from the torque converter clutch. TCC apply fluid pressure applies the TCC.

Release fluid also exhausts from the TFP manual valve position switch and the TFP manual valve position switch signals the PCM that the TCC is engaged.

Cooler Check Valve

Located in either the case cover or cooler line fitting depending on model. Allows cooler fluid to pass through the cooler and provide lubrication for the transmission. It also prevents converter drainback when the engine is off.

Number 1 Ball Check Valve (372)

Located in the case cover (400), blocks TCC release fluid while sending TCC apply fluid to the torque converter clutch blow-off valve (417-20).

Converter Clutch Blow-off Valve

Limits maximum TCC apply pressure to prevent torque converter damage.

Scheme 156

Overdrive Range, Fourth Gear - Torque Converter Clutch Applied (With Touch Activated Power)

The torque converter clutch applies during third or fourth gear operation after the powertrain control module (PCM) receives the appropriate input signals to energize the TCC control (PWM) solenoid. To apply the torque converter clutch, the following changes take place in the electrical and hydraulic systems

When conditions are appropriate, the PCM energizes the TCC control (PWM) solenoid to initiate the TCC apply. The solenoid is pulse width modulated (PWM) to provide a smooth TCC apply (refer to the appropriate electrical controls information for a detailed description of the TCC control (PWM) solenoid operation). When energized, the TCC control (PWM) solenoid modulates 2nd fluid into the TCC signal (PWM) fluid circuit.

TCC signal (PWM) fluid pressure modulates the valve against spring force and TCC regulated apply fluid pressure. This action directs line pressure into the TCC regulated apply fluid circuit in relation to vehicle operating conditions.

Modulated TCC signal (PWM) fluid pressure moves the valve against spring force in relation to vehicle operating conditions. This action regulates TCC regulated apply fluid into the TCC apply fluid circuit. At the same time, the TCC release fluid circuit is opened to an orificed exhaust. In this position the valve directs converter feed fluid to feed the cooler fluid circuit.

TCC apply fluid is routed to the torque converter clutch at the same time TCC release fluid exhausts from the torque converter clutch. TCC apply fluid pressure applies the TCC.

Release fluid also exhausts from the TFP manual valve position switch and the TFP manual valve position switch signals the PCM that the TCC is engaged.

Located in either the case cover or cooler line fitting depending on model. Allows cooler fluid to pass through the cooler and provide lubrication for the transmission. It also prevents converter drainback when the engine is off.

Located in the case cover (400), blocks TCC release fluid while sending TCC apply fluid to the torque converter clutch blow-off valve (417-20).

Limits maximum TCC apply pressure to prevent torque converter damage.

Scheme 157

Overdrive Range, 4-3 Downshift - Torque Converter Clutch Not Applied (Without Touch Activated Power)

When the transmission is operating in Fourth gear, a 4-3 downshift will occur if there is a significant change (increase) in the throttle position or if the load on the engine is increased. When the 4-3 downshift occurs, the torque converter clutch will release prior to the shift occurring which results in the following changes in the hydraulic system

Pressure Control (PC) Solenoid

During the downshift, except for a coastdown, the PCM senses the increase in throttle position or engine load and increases the PC solenoid duty cycle. The increase in duty cycle increases output fluid pressure from the PC solenoid, thereby increasing torque signal fluid pressure at the torque signal regulator valve.

Pressure Regulator Valve

Increased torque signal fluid pressure acting on the line boost valve increases line pressure at the pressure regulator valve.

TCC Control (PWM) Solenoid Valve

As the throttle position changes, the throttle position sensor provides input to the PCM indicating throttle angle. The PCM then lowers the ON/OFF cycle time of the TCC control PWM solenoid valve, lowering TCC signal (PWM) fluid pressure.

Lowered TCC signal (PWM) fluid pressure allows the valve to move with spring pressure, allowing converter feed fluid into the TCC release circuit. TCC release fluid is then routed to the torque converter pressure plate and disengages the torque converter clutch, TCC apply fluid from the torque converter clutch pressure plate is then routed back through its circuit to the converter clutch control valve. TCC apply fluid passes through the valve and enters the cooler circuit.

When the TCC is in the release position, TCC release fluid pressure is routed to the TFP manual valve position switch. This fluid pressure signals the PCM that the TCC is in the released position.

De-energizes, allowing 1-2, 3-4 signal fluid at the 3-4 shift valve (362) to exhaust through the solenoid.

When 1-2, 3-4 signal fluid exhausts, spring force moves the valve allowing 4th clutch fluid to exhaust through the valve.

Fourth Clutch fluid is exhausted at the 3-4 shift valve and the driven support ball check valve. Fourth clutch return spring pressure moves the fourth clutch piston and releases the fourth clutch.

4th Clutch fluid exhausts from the accumulator. Spring force and 3-4 accumulator feed fluid pressure move the accumulator piston to the Third gear position.

The accumulator valve regulates line pressure into the 3-4 accumulator fluid circuit to fill the 3-4 accumulator. This regulation is basically controlled by torque signal fluid pressure. Increased torque signal fluid pressure regulates accumulator fluid to a higher pressure. Note: The clutch and band application information is the same as Overdrive Range - Third Gear.

Scheme 158

Overdrive Range, 4-3 Downshift - Torque Converter Clutch Not Applied (With Touch Activated Power)

When the transmission is operating in Fourth gear, a 4-3 downshift will occur if there is a significant change (increase) in the throttle position or if the load on the engine is increased. When the 4-3 downshift occurs, the torque converter clutch will release prior to the shift occurring which results in the following changes in the hydraulic system

During the downshift, except for a coastdown, the PCM senses the increase in throttle position or engine load and increases the PC solenoid duty cycle. The increase in duty cycle increases output fluid pressure from the PC solenoid, thereby increasing torque signal fluid pressure at the torque signal regulator valve.

Increased torque signal fluid pressure acting on the line boost valve increases line pressure at the pressure regulator valve.

As the throttle position changes, the throttle position sensor provides input to the PCM indicating throttle angle. The PCM then lowers the ON/OFF cycle time of the TCC control PWM solenoid valve, lowering TCC signal (PWM) fluid pressure.

Lowered TCC signal (PWM) fluid pressure allows the valve to move with spring pressure, allowing converter feed fluid into the TCC release circuit. TCC release fluid is then routed to the torque converter pressure plate and disengages the torque converter clutch, TCC apply fluid from the torque converter clutch pressure plate is then routed back through its circuit to the converter clutch control valve. TCC apply fluid passes through the valve and enters the cooler circuit.

When the TCC is in the release position, TCC release fluid pressure is routed to the TFP manual valve position switch. This fluid pressure signals the PCM that the TCC is in the released position.

De-energizes, allowing 1-2, 3-4 signal fluid at the 3-4 shift valve (362) to exhaust through the solenoid.

When 1-2, 3-4 signal fluid exhausts, spring force moves the valve allowing 4th clutch fluid to exhaust through the valve.

Fourth Clutch fluid is exhausted at the 3-4 shift valve and the driven support ball check valve. Fourth clutch return spring pressure moves the fourth clutch piston and releases the fourth clutch.

4th Clutch fluid exhausts from the accumulator. Spring force and 3-4 accumulator feed fluid pressure move the accumulator piston to the Third gear position.

The accumulator valve regulates line pressure into the 3-4 accumulator fluid circuit to fill the 3-4 accumulator. This regulation is basically controlled by torque signal fluid pressure. Increased torque signal fluid pressure regulates accumulator fluid to a higher pressure. Note: The clutch and band application information is the same as Overdrive Range - Third Gear.

Scheme 159

Drive Range, Manual Third (from Overdrive Range) (Without Touch Activated Power)

A manual 4-3 downshift is accomplished by moving the gear selector lever to the Manual Third (3) position. In Manual Third the transmission is hydraulically prevented from upshifting into Fourth gear under any conditions. Also, the input clutch is applied in Manual Third range to provide engine compression braking in 3rd gear. The following information explains the additional changes during a manual 4-3 downshift as compared to a forced 4-3 downshift. Refer to Overdrive Range: 4-3 Downshift for a complete description of a 4-3 downshift.

Manual Valve

The manual valve moves into the Manual Third (3) position and line pressure enters the D3 fluid circuit.

Allows D3 fluid to enter the input clutch feed passage and directs it to the 3-4 shift valve (362).

Is downshift when D3 fluid is fed to the valve. In this position input clutch feed fluid enters the input clutch passage. 4th clutch fluid is exhausted through an orifice.

Number 3 Ball Check Valve (372)

Located in the case cover (400), it is seated against the PRN passage allowing input clutch fluid to apply the input clutch.

When de-energized, it allows 1-2, 3-4 signal fluid from the 3-4 shift valve (362) to exhaust through the solenoid. However, this event does not have to occur in order to achieve a manual 4-3 downshift.

Manual Third-Second and First Gears

The transmission operates the same in Manual Third as in Overdrive range with the exception of Fourth gear being prevented. The transmission will upshift and downshift between First, Second and Third gears as in Overdrive range. However, engine compression braking is not available in Manual Third - First gear and the vehicle will coast when the throttle is released.

Scheme 160

Manual Third Gear (With Touch Activated Power)

A manual 4-3 downshift is accomplished by moving the gear selector lever to the Manual position. In Manual the transmission is hydraulically prevented from upshifting into Fourth gear under any conditions. Also, the input clutch is applied in Manual range to provide engine compression braking in 3rd gear. The following information explains the additional changes during a manual 4-3 downshift as compared to a forced 4-3 downshift. Refer to Overdrive Range: 4-3 Downshift for a complete description of a 4-3 downshift.

The manual valve moves into the Manual position and line pressure enters the braking fluid circuit.

Allows braking fluid to enter the input clutch feed passage and directs it to the 3-4 shift valve (362).

Is downshift when D3 fluid is fed to the valve. In this position input clutch feed fluid enters the input clutch passage. 4th clutch fluid is exhausted through an orifice.

Located in the case cover (400), it is seated against the PRN passage allowing input clutch fluid to apply the input clutch.

When de-energized, it allows 1-2, 3-4 signal fluid from the 3-4 shift valve (362) to exhaust through the solenoid. However, this event does not have to occur in order to achieve a manual 4-3 downshift.

The transmission operates the same in Manual Third as in Overdrive range with the exception of Fourth gear being prevented. The transmission will upshift and downshift between First, Second and Third gears as in Overdrive range. However, engine compression braking is not available in Manual Third - First gear and the vehicle will coast when the throttle is released.

Scheme 161

Drive Range, Manual Second (from Drive, Manual Third) (Without Touch Activated Power)

When the gear selector lever is moved to the Manual Second (D2) gear range, the manual valve moves and allows line pressure to enter the D2 fluid passage. The transmission reacts by shifting immediately into second gear range and is prevented from upshifting into either Third or Fourth gear.

Is moved by the gear selector lever allowing line pressure to enter the D2 passage.

Number 8 Ball Check Valve (372)

Located in the control valve body (300), is fed D2 fluid from the manual valve (404) and directs it to the 2-3 shift valve (357).

When shifted by D2 fluid, it allows D2 to enter the manual 2-1 servo feed passage to stroke the manual 2-1 servo assembly (104-115) and allows 3rd fluid to exhaust.

Manual 2-1 Servo Assembly (104-115)

Applies the manual 2-1 band (680) during manual second and manual first gear ranges.

Located in the case cover (400), it directs 3rd clutch/lo-1st exhaust fluid into the 3rd clutch passage, releasing the 3rd clutch.

When energized, it allows line pressure to enter the 2-3 signal fluid passage and sends it to the 4-3 manual downshift valve (360) and 3-2 manual downshift valve (356). However, this event does not have to occur in order to achieve a manual 3-2 downshift.

3-2 Manual Downshift Valve (356)

Is shifted by 2-3 signal fluid and prevents the 2-3 shift valve (357) from upshifting.

The PCM increases the PC solenoid duty cycle to increase the operating range of torque signal fluid pressure in Manual Second. This provides increased line pressure for the additional torque requirements during engine compression braking and increased engine load in Manual Second.

The PCM will release the TCC before downshifting into Manual Second. The TCC will not re-apply in Second gear under normal operating conditions.

Scheme 162

Manual Second Gear (With Touch Activated Power)

When the gear selector lever is moved to the Manual gear range, the manual valve moves and allows line pressure to enter the Braking fluid passage. The transmission reacts by shifting immediately into second gear range and is prevented from upshifting into either Third or Fourth gear.

Is moved by the gear selector lever allowing line pressure to enter the braking passage.

Located in the control valve body (300), is fed braking fluid from the manual valve (404) and directs it to the 2-3 shift valve (357).

When shifted by braking fluid, it allows 3rd fluid to exhaust.

Is shifted by 2-3 signal fluid and prevents the 2-3 shift valve (357) from upshifting. It also allows braking fluid to enter the manual 2-1 servo feed passage to stroke the manual 2-1 servo assembly (104-115).

Applies the manual 2-1 band (680) during manual second and manual first gear ranges.

Located in the case cover (400), it directs 3rd clutch/lo-reg exhaust fluid into the 3rd clutch passage, releasing the 3rd clutch.

When energized, it allows line pressure to enter the 2-3 signal fluid passage and sends it to the 4-3 manual downshift valve (360) and 3-2 manual downshift valve (356).

The PCM increases the PC solenoid duty cycle to increase the operating range of torque signal fluid pressure in Manual Second. This provides increased line pressure for the additional torque requirements during engine compression braking and increased engine load in Manual Second.

The PCM will release the TCC before downshifting into Manual Second. The TCC will not re-apply in Second gear under normal operating conditions.

Scheme 163

Drive Range, Manual First (from Drive, Manual Second) (Without Touch Activated Power)

A manual 2-1 downshift is initiated by moving the gear selector lever to the Manual First (1) position. However, the transmission will not downshift into First gear until vehicle speed is below approximately 60 km/h (37 mph). At higher vehicle speeds the PCM will keep 1-2 shift solenoid (SS) valve de-energized (OFF) and the transmission will operate in Manual First - Second Gear. In Manual First the transmission is electronically prevented from upshifting into Third or Fourth gears under any conditions. Also, the third clutch is applied in Manual First - First Gear to provide engine compression braking.

Line pressure is routed into the Lo fluid circuit when the selector lever is moved into the Manual First (1) position. Line pressure continues to feed the D4, D3 and D2 fluid circuits as in Manual Second.

Number 7 Ball Check Valve (372)

Located in the control valve body (300), directs Lo fluid to the 1-2 shift valve (318).

When shifted against spring force, allows Lo fluid to enter the Lo-1st passage to the pressure regulator valve (313). During release of the 2nd clutch, exhausting 2nd fluid passes through the valve and enters the 3rd fluid passage.

Lo Blow Off Valve (407)

A relief valve that exhausts excess Lo fluid pressures above 448 kPa (65 psi) from the 3rd clutch apply circuit.

Located in the case cover (400), it seats against 3rd clutch fluid allowing Lo-1st fluid to enter the 3rd clutch fluid passage and apply the 3rd clutch.

Energizes, allowing line pressure to feed into the 1-2, 3-4 signal fluid passage and to the 3-4 shift valve (362).

Located in the case cover (400), forces exhausting 2nd clutch apply fluid through an orifice into the 2nd clutch passage and to the 1-2 shift valve (318).

Lo fluid is directed through the 1-2 shift valve (318) into the Lo-1st fluid passage. Lo-1st fluid is sent to the pressure regulator valve (313) to boost line pressure and at the same time to the Lo blow off valve (407). The addition of Lo-1st fluid pressure increases the operating range of line pressure in Manual First.

Scheme 164

Manual First Gear (With Touch Activated Power)

A manual 2-1 downshift is initiated by moving the gear selector lever to the Manual position. However, the transmission will not downshift into First gear until vehicle speed is below approximately 60 km/h (37 mph). At higher vehicle speeds the PCM will keep 1-2 shift solenoid (SS) valve de-energized (OFF) and the transmission will operate in Manual - Second Gear. Also, the third clutch is applied in Manual First - First Gear to provide engine compression braking.

Line pressure is routed into the braking circuit when the selector lever is moved into the Manual position. Line pressure continues to feed the D4 in Manual.

Located in the control valve body (300), directs braking to the 1-2 shift valve (318).

When shifted against spring force, allows braking to enter the braking-1st gear passage to the low regulator valve (313). During release of the 2nd clutch, exhausting 2nd fluid passes through the valve and enters the 3rd fluid passage.

Lo Blow Valve (443)

When shifted against spring force, allows braking first gear fluid to be directed into low reg fluid passage.

Located in the case cover (400), it seats against 3rd clutch fluid allowing low reg fluid to enter the 3rd clutch/lo-1st fluid passage and apply the 3rd clutch.

Energizes, allowing line pressure to feed into the 1-2, 3-4 signal fluid passage and to the 3-4 shift valve (362).

Located in the case cover (400), forces exhausting 2nd clutch apply fluid through an orifice into the 2nd clutch passage and to the 1-2 shift valve (318).

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