Automatic Transaxle Overhaul & Testing - 4t60-e Buick LeSabre VII

APPLICATION

TRANSMISSION APPLICATIONS

IDENTIFICATION

Note. For testing and diagnostic procedures of electronic components, see AUTO TRANS DIAGNOSIS - 4T60-E - 1995 article or AUTO TRANS DIAGNOSIS - 4T60-E - 1996 article.

All transaxles have a metal identification plate attached to the rear face of transaxle case. (Scheme 1)

BODY CODE DESIGNATIONS (1995-96 PASSENGER CARS & VANS)

Scheme 1

DESCRIPTION

Hydra-Matic 4T60-E transaxle is a fully automatic 4-speed unit consisting primarily of a 3-element hydraulic torque converter and converter clutch. Transaxle uses a variable capacity vane-type oil pump to supply all hydraulic pressure needed for operation.

Multiplied torque from torque converter is transferred to transaxle by a sprocket and drive link chain assembly. Other internal components consist of 4 multiple-disc clutches, a roller clutch, a sprag clutch, 3 bands and a compound planetary gear set. Final drive gear and differential assemblies are an integral part of transaxle.

Transaxle uses 2 electronic shift solenoids, controlled by the Powertrain Control Module (PCM), to switch hydraulic pressure on or off. Another electronic solenoid controls Torque Converter Clutch (TCC) lock-up. Some models also use a Pulse Width Modulated (PWM) solenoid to control rate of TCC apply.

LUBRICATION

See appropriate TRANSMISSION SERVICING - A/T article in TRANSMISSION SERVICING.

ADJUSTMENTS

See appropriate TRANSMISSION SERVICING - A/T article in TRANSMISSION SERVICING.

ON-VEHICLE SERVICE

The following components can be serviced without removing transaxle from vehicle.

1. Case Side Cover Pan
2. Converter-To-Flexplate Bolts
3. Cooler Lines
4. Drive Axles
5. Filler Pipe
6. Final Drive
7. Forward Servo
8. Reverse Servo
9. Scavenger Oil Scoop
10. Shift Control Cable
11. Solenoids
12. Speed Sensor
13. Thermal Element
14. Transaxle Pan
15. Transaxle Filter
16. Vacuum Modulator
17. Valve Body
18. Wiring Harness
19. 1-2 Servo
20. 1-2 Or 3-4 Accumulator Assemblies
21. 2nd, 3rd And 4th Gear Pressure Switches (if equipped)

VALVE BODY

See OIL PUMP & VALVE BODY under TRANSAXLE DISASSEMBLY.

DRIVE AXLE SHAFTS

See appropriate AXLE SHAFTS - FRONT article in DRIVE AXLES.

OIL COOLER FLUSHING

1. If available, fill Line Flusher (J-35944) with solution, and install oil cooler and line flusher to top transaxle cooler line on transaxle. Follow manufacturer's instructions to flush oil cooler and cooler lines.
2. If line flusher is not available, flush cooler and cooler lines with a mixture of clean solvent and water. Flush cooler in both directions until all old fluid and debris are removed. If necessary, replace plugged or damaged cooler and/or lines.

TROUBLE SHOOTING

Note. For testing and diagnostic procedures of electronic components, see AUTO TRANS DIAGNOSIS - 4T60-E - 1995 article or AUTO TRANS DIAGNOSIS - 4T60-E - 1996 article.

Note. For clutch and band applications, see CLUTCH & BAND APPLICATION CHART table.

QUICK CHECK

1. Check level and condition of transaxle fluid. Check PCM memory for stored Diagnostic Trouble Codes (DTCs). See DTC checking procedures in «AUTO TRANS DIAGNOSIS - 4T60-E - 1995»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#diagnosis-4t60-e) article or procedures in «AUTO TRANS DIAGNOSIS - 4T60-E - 1996»(ref-56004) article. If no DTCs are present, go to next step. If DTCs are present, diagnose and repair all PCM-related trouble codes. Clear PCM trouble code memory.
2. Perform road test. See «ROAD TEST»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e__road-test) under TESTING. During road test, record shift points. If shift point timing or shifting is incorrect, see diagnostic procedures in «AUTO TRANS DIAGNOSIS - 4T60-E - 1995»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#diagnosis-4t60-e) article or go to «AUTO TRANS DIAGNOSIS - 4T60-E - 1996»(ref-56004) article.
3. If shift(s) is too harsh or too soft, see «HYDRAULIC PRESSURE TESTS»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e__hydraulic-pressure-tests) under TESTING. For specific complaints, see appropriate condition(s) listed under «SYMPTOM DIAGNOSIS»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e__symptom-diagnosis) .

SYMPTOM DIAGNOSIS

Note. PCM controls TCC, PWM solenoid (if equipped) and shift solenoids "A" and "B".

Oil Out Of Vent Or Foaming

Transaxle overfilled. Oil contaminated with antifreeze or engine overheating. Oil filter "O" ring damaged or missing. Thermo element in case does not close when hot, incorrect pin height or thermo element incorrectly installed. Modulator "O" ring incorrectly installed or damaged. Drive sprocket support drain back holes plugged.

High Or Low Line Pressure

Incorrect oil level. Vacuum line leaking, pinched, disconnected or cut. Aspirator "T" connection installed backward or blocked. Modulator diaphragm damaged. Modulator valve nicked, scored or stuck. Oil pump assembly seals or vanes damaged or slide stuck. Pump drive shaft damaged. Pressure regulator valve spring damaged or pressure regulator valve nicked or scored. Pressure relief valve spring damaged or ball missing. Check balls missing in control valve body. Pump or case cover leaking (bolts loose).

Delayed Engagement

Low fluid level. Oil cooler check ball not seating. Reverse servo or forward servo seals cut or damaged. Cut or damaged input housing piston seal. Damaged forward servo seals or servo assembly.

No Drive In "D"

1. Low oil level or line pressure. Manual linkage misadjusted or disconnected. Piston or seal damaged in forward servo assembly. Drive axles disengaged. Leaking or damaged 2-1 servo oil pipe seals. Damaged oil pump drive shaft or pump assembly. Incorrect No. 3 check ball location. Torque converter stator roller clutch damaged. Input clutch accumulator piston seal damaged. Drive link assembly damaged, drive link chain broken or sprockets and bearings damaged.
2. Input clutch assembly plates burned, clutch plates missing, check ball capsule leaking or missing. Input piston seals cut or damaged, or shaft feed passages blocked. Damaged or incorrectly assembled input sprag or input sun gear assembly. Burned 3rd roller clutch (due to lack of lubrication), oil lube pipe leaking or damaged.
3. Input carrier and reaction carrier assembly pinions, internal ring gear or sun gear damaged. Output shaft damaged or drive axles incorrectly assembled into differential. Burned 1-2 band assembly or band out of position. Parking pawl spring broken. Damaged final drive assembly or final drive sun gear, side gears, pinion gears or internal ring gear.

Slips In "D"

Low fluid level. Vacuum line pinched or cut. Damaged modulator. Low line pressure. Oil pump assembly seals or vanes damaged or slide stuck. Modulator valve stuck or binding. Damaged forward servo assembly or leaking servo piston seal. Oil filter screen plugged. Leaking or damaged servo pipe seals. Torque converter stator roller clutch not holding. Input clutch accumulator piston or input shaft seals damaged. Leaking ball capsule or damaged input clutch assembly seals. Check for problem with solenoid "A" or "B". Check for switched wires between TCC and solenoid "B".

No 1-2 Shift (1st Gear)

Check for binding or stuck 1-2 shift valve. Spacer plate or gaskets mispositioned or damaged. Drive sprocket support oil sealing rings damaged. Clutches in 2nd clutch assembly damaged. Piston or piston seals in 2nd clutch damaged. Incorrectly assembled 2nd clutch. Missing or damaged check ball capsule in 2nd clutch housing. Reverse reaction drum splines damaged or reverse reaction drum plate missing.

Harsh Or Soft 1-2 Shift

High or low line pressures. Damaged 1-2 accumulator piston seals or piston springs missing. Accumulator cover bolts improperly tightened or gaskets mispositioned. Accumulator valve in control valve body stuck. Incorrect No. 2 check ball location. Damaged seals on driven support sprocket.

1-2 Shift Shudder

Damaged 2nd clutch or driven sprocket support.

No 2-3 Shift (1st & 2nd Gears)

Check for DTCs. Diagnose and repair as necessary. Solenoid "B" stuck on. Dirt in solenoid, PCM signal to solenoid "B" grounded or signal return wire shorted to ground.

1-4 Shift (Misses 2nd & 3rd Gears)

Check for DTCs. Diagnose and repair as necessary. Solenoid "A" stuck on. Dirt in solenoid, PCM signal to solenoid "A" grounded or signal return wire shorted to ground.

2-3 Shift Only

Check for DTCs. Diagnose and repair as necessary. Failed solenoid "A" (solenoid off). Dirt in filter, PCM not grounded, leaking "O" ring, no supply voltage to solenoid "A" or wire disconnected.

1-2-4 Shift (No 2-3 Shift)

Stuck 2-3 shift valve or 3-2 manual shift valve. Mispositioned or damaged channel plate gasket. Blocked 3rd clutch port in driven sprocket support. Seals damaged or leaking in input shaft. Burned 3rd clutch assembly. Damaged or incorrectly assembled 3rd roller clutch assembly.

Harsh Or Soft 2-3 Shift

Low or high oil pressures. Mispositioned No. 4 check ball causing soft shift. Leaking 2-3 accumulator piston. Missing No. 9 check ball causing harsh shift.

Early Or Late 2-3 Shift

Wrong PROM. Check for possible service bulletins.

3-4 Shift (Misses 1st & 2nd Gears)

Check for DTCs. Diagnose and repair as necessary. Solenoid "B" stuck off. Dirt in solenoid, "O" ring leaking, PCM signal to solenoid "B" grounded or signal return wire shorted to ground.

No 3-4 Shift

Check for manual shift linkage out of adjustment. Sticking 3-4 shift valve. Splines on 4th clutch shaft damaged. Burned 4th clutch assembly plates, damaged piston seals or incorrect number of clutch plates.

Harsh Or Soft 3-4 Shift

High or low line pressures. Accumulator cover bolts improperly tightened. Damaged accumulator seals or pistons. Check for stuck 3-4 accumulator valve in control valve body or missing No. 10 check ball.

Early Or Late 3-4 Shift

Wrong PROM. Check for possible service bulletins.

No Reverse

1. Low oil pressure. Reverse servo or apply pin incorrectly assembled, piston or seal damaged. Damaged oil pump drive shaft or oil pump assembly. Input clutch accumulator piston seal damaged. Drive link assembly damaged or drive link chain broken. Burned, damaged or mispositioned reverse band. Input clutch assembly plates burned, clutch plates missing or check ball capsule leaking or missing.
2. Input piston seals cut or damaged, or shaft feed passages blocked. Damaged or incorrectly assembled input sprag or input sun gear assembly. Reverse reaction drum splines damaged. Burned 3rd roller clutch (due to lack of lubrication), or oil lube pipe leaking or damaged.
3. Input carrier and reaction carrier assembly pinions, internal ring gear or sun gear damaged. Output shaft damaged or drive axles incorrectly assembled into differential assembly. Damaged solenoid "A" or TCC solenoid. Parking pawl spring broken. Damaged final drive assembly or final drive sun gear, side gears, pinion gears or internal ring gear.

Locked In Reverse

Damaged parking pawl binding on final drive internal gear.

Slips In Reverse

Low oil pressure. Reverse servo seal damaged. Reverse reaction drum splines stripped.

Vehicle Moves In Park

Manual linkage damaged or disconnected. Broken final drive parking pawl spring, parking pawl or parking pawl gear in final drive internal gear assembly. Park actuator spring damaged.

Harsh Neutral-To-Drive Engagement

Engine idle too high. Loss of vacuum due to damaged lines, aspirator "T" or modulator. Aspirator "T" installed backward or plugged. Reverse servo cushion spring weak or broken. Check ball No. 5 missing (also harsh engagement in Reverse). Check ball No. 6 is missing. Control valve body spacer plate mispositioned. Thermal element does not close when warm. Reverse servo apply pin too long.

Vehicle Starts In 2nd Gear

Stuck 1-2 shift valve.

Harsh Reverse

Scored 2nd clutch housing. Burned reverse band fiber. Check for missing or mispositioned check ball No. 5, or damaged or wrong servo cushion spring.

No Engine Braking In Manual 2nd Or Low

Burned 1-2 band. Apply pin not engaging 1-2 band. Apply servo seals leaking, servo cover loose or piston binding in bore.

Harsh 4-3 Downshift

Missing No. 10 check ball in control valve body. 3-4 accumulator valve stuck or 3-4 accumulator seal cut.

Harsh 3-2 Downshift

No. 9 check ball in control valve body missing. 2-3 accumulator valve stuck or 2-3 accumulator seal cut.

Harsh 2-1 Downshift

Wrong spacer plate, stuck 1-2 accumulator valve or cut 1-2 accumulator seal.

Note. PCM controls TCC, PWM solenoid (if equipped) and shift solenoids "A" and "B".

No Converter Clutch Apply

Verify proper PCM operation and vehicle wiring. Coolant temperature sensor damaged. Damaged wiring harness or pinched wires. Solenoid inoperative. Converter clutch shift valve in control valve body stuck. Converter clutch apply valve stuck. Solenoid "O" ring leaking or screen blocked.

Torque converter external leaks at hub weld area, or fluid unbalanced or contaminated. Turbine shaft seals damaged. Oil pump drive shaft seal damaged. Channel plate converter clutch blow-off check ball not seated or damaged. Damaged or missing TCC accumulator piston or seal (without PWM solenoid only).

Converter Clutch Does Not Release

PCM-controlled TCC solenoid does not exhaust. Control valve body converter clutch apply valve stuck in apply position. TCC orifice screen missing.

Converter Clutch Stuck On In 3rd & 4th

TCC solenoid stuck on. Dirt in TCC solenoid. Wire between TCC solenoid and PCM shorted to ground.

Converter Applied With Maximum Pressure (With PWM)

PWM solenoid always off. Dirt in solenoid. Leaky "O" ring. No voltage to PWM solenoid. Open wire or no apply signal from PCM.

Converter Clutch Apply Rough, Slips Or Shudders

Control valve body converter clutch regulator valve stuck. Turbine shaft seals damaged or missing. Converter clutch blow-off check ball not sealed or damaged. Damaged channel plate converter clutch accumulator piston or seal (if equipped). Spring damaged. Wrong blow-off spring. Seals damaged or missing. Defective converter clutch.

No TCC

Check for DTCs. Diagnose and repair as necessary. Check the following solenoids and switches for faulty operation, dirt or binding: TCC solenoid, PWM, brake switch, PRNDL ("P"/"N" switch) and coolant temperature sensor. Check same solenoid and switch circuits for open or shorted wires between voltage supply or PCM.

Scheme 2

CLUTCH & BAND APPLICATIONS

CLUTCH & BAND APPLICATION CHART (4T60-E)

ELECTRONIC SELF-DIAGNOSTICS & ELECTRONIC TESTING

Note. See AUTO TRANS DIAGNOSIS - 4T60-E - 1995 article or AUTO TRANS DIAGNOSIS - 4T60-E - 1996 article in AUTOMATIC TRANSMISSIONS.

ROAD TEST

Note. Before road testing vehicle, engine and transaxle must be at operating temperature. Torque converter clutch will not engage if engine coolant has not reached operating temperature.

Gear Selector Position "D" (Overdrive)

1. With gear selector in "D" (overdrive) position, steadily increase throttle pressure to accelerate vehicle. Note shift speed engagement points in 2nd gear, 3rd gear and overdrive gear. Use chart as a reference for proper shift speeds. (Scheme 3) Also note Torque Converter Clutch (TCC) engagement point while in 3rd gear or Overdrive. NOTE: Ensure TCC engages in 3rd gear or overdrive during the following steps. On vehicles with PWM solenoid, TCC engagement point may be hard to feel. Use scan tool to indicate TCC engagement and release points.
2. At vehicle speeds of 40-50 MPH, quickly depress accelerator to half-open position (part throttle detent downshift). TCC should release, and transaxle should immediately downshift to 3rd gear.
3. At vehicle speeds of 40-50 MPH, quickly depress accelerator to wide open position (full throttle detent downshift). TCC should release, and transaxle should immediately downshift to 2nd gear.
4. At vehicle speeds of 40-55 MPH, release accelerator pedal while moving gear selector to "3" (third gear) position. TCC should release, transaxle should downshift into 3rd gear, and engine braking should slow vehicle.
5. Move gear selector to "D" (overdrive) position, and accelerate to 40-45 MPH. Release accelerator pedal while moving gear selector to "2" (2nd gear) position. TCC should release, transaxle should downshift to 2nd gear immediately, and engine braking should slow vehicle.
6. Move gear selector to "D" (overdrive) position, and accelerate to 25 MPH. Release accelerator pedal while moving gear selector to "1" (1st gear) position. TCC should release, transaxle should downshift to 1st gear and engine braking should slow vehicle.
7. With gear selector in "D" (overdrive) position, accelerate vehicle to overdrive gear with TCC applied. Release accelerator pedal, and lightly apply brakes. TCC should release. Note speeds at which vehicle downshifts. (Scheme 3)

Gear Selector Position "3" (3rd Gear)

With vehicle stopped, move gear selector to "3" (3rd gear) position and steadily increase throttle pressure to accelerate vehicle. Note speeds at which vehicle shifts into 2nd and 3rd gears. (Scheme 3) Also note when TCC engages while in 3rd gear.

Gear Selector Position "2" (2nd Gear)

With vehicle stopped, move gear selector to "2" (2nd gear) position. Accelerate vehicle and note speed at which vehicle shifts from 1st gear to 2nd gear. Accelerate vehicle to 25 MPH. Transaxle should not shift into 3rd gear, and TCC should not engage.

Gear Selector Position "1" (1st Gear)

With vehicle stopped, move gear selector to "1" (1st gear) position. Accelerate vehicle to 15 MPH. Transaxle should not upshift, and TCC should not engage.

Scheme 3

HYDRAULIC PRESSURE TESTS

1. Before performing hydraulic pressure tests, check fluid level and condition. Check manual control linkages for correct adjustment, and ensure engine is properly tuned.
2. Connect tachometer to engine, hand-held vacuum pump to vacuum modulator and oil pressure gauge to line pressure test port. (Scheme 1) Check line pressure at specified engine RPM. (Scheme 4)

Note. Hydraulic pressure is controlled by pump output and regulated by pressure regulator valve. Line pressure is boosted by reverse boost valve when gear selector is in "R" and "D1" positions. Line pressure should increase with throttle opening due to decrease in engine vacuum to modulator.

Minimum Line Pressure Check

Start engine, and apply 18 in. Hg to vacuum modulator. Record line pressure readings in all gear selector positions with engine running at specified RPM, and compare recorded pressures to specifications. (Scheme 4) If recorded pressure is incorrect, see HIGH OR LOW LINE PRESSURE under TROUBLE SHOOTING.

Full Line Pressure Check

Release vacuum applied to modulator. Record line pressure readings in all gear selector positions with engine running at specified engine RPM. Compare recorded pressures to specifications. (Scheme 4) If pressure recorded is incorrect, see HIGH OR LOW LINE PRESSURE under TROUBLE SHOOTING.

Scheme 4

Inspection

Torque converter must be replaced for any of the following reasons.

1. Damage To Pump Assembly
2. Metal Particles Present In Oil
3. Leaks In Hub Weld Area
4. Crankshaft Pilot Broken Or Damaged
5. Hub Scored Or Damaged
6. Stator Failure
7. Torque Converter Imbalance
8. Engine Coolant Contamination
9. Excessive End Play

End Play Check

Mount Torque Converter End Play Fixture (J-35138) and Dial Gauge (J-8001) on torque converter to check end play. End play should be 0-.020" (0-0.50 mm). (Scheme 5)

Scheme 5

REMOVAL & INSTALLATION

See appropriate TRANSMISSION REMOVAL & INSTALLATION - A/T article in TRANSMISSION SERVICING.

TRANSAXLE DISASSEMBLY

Note. (Scheme 30)- (Scheme 33) for disassembly and reassembly reference.

Note. Beginning on February 2, 1995, (about half way through 1995 model year) all 4T60-E transaxles were built using a redesigned 2-1 servo square cut seal. Seal is located above 2-1 servo cover. (Scheme 6) Seal requires a deeper seal pocket in transaxle case. This design change improves assembly process. NEW design seal (.132") is twice as tall as previous design seal (.066"). Seal thickness and outside diameter did not change. Seal retains fluid in forward servo circuit to apply forward band. Seal pocket in transaxle case is machined deeper (.112") then previous design (.054"). Redesigned seal is available from manufacturer in Service Package (24204817). Both seal designs are included in this package. Seals are NOT interchangeable.

REAR SECTION

Thoroughly clean transaxle exterior. Drain fluid, and remove torque converter. Place transaxle in holding fixture. Remove speed sensor and rear extension housing.

LOWER SECTION

Remove bottom oil pan, oil filter, accumulator cover with 2-1 servo feed and return pipes. Remove modulator and modulator valve. Check modulator with known good modulator and Tester (36619). If necessary, replace modulator. Remove all retainers, gaskets, pipes, 2-1 manual servo assembly and accumulator piston assemblies from bores ( DO NOT interchange springs). (Scheme 6)

Scheme 6

SERVO ASSEMBLIES

Apply inward pressure to top of reverse servo cover, and remove cover retaining ring. Remove reverse servo cover and reverse servo assembly from case. (Scheme 7) Remove forward servo cover bolts. Remove servo cover and forward servo assembly from case. (Scheme 8)

Scheme 7

Scheme 8

OIL PUMP & VALVE BODY

1. Remove side cover attaching bolts, nuts and washers. Remove side cover and gaskets. Disconnect wiring harness from pressure switches, solenoid and case connector. Remove wiring harness.
2. Remove linkage and bracket from valve body assembly. Remove oil pump assembly bolts to remove oil pump from valve body. (Scheme 9) Remove servo pipe retainer bolt and retainer plate. Remove remaining mounting bolts from valve body, and remove valve body from channel plate.
3. Remove spacer plate and gaskets. Remove oil pump drive shaft. Remove 6 check balls between channel plate and spacer plate. Remove 4 check balls between spacer plate and valve body.

Scheme 9

CHANNEL PLATE ASSEMBLY & 4TH CLUTCH

1. Remove oil dam from cavity above 4th clutch assembly. Disconnect manual valve link from manual valve, and pull spring back. Place detent lever in Park position for clip removal. Remove channel plate attaching bolts. Remove channel plate and channel plate gaskets.
2. Remove input clutch accumulator piston assembly and converter clutch accumulator piston assembly. Remove 4th clutch plates and apply plate. Remove 4th clutch hub thrust washer. Remove 4th clutch hub and shaft. (Scheme 33)

FINAL DRIVE ASSEMBLY

1. Rotate output shaft until "C" ring opening is visible from beneath lower tapered end of transaxle case. Using "C" Ring Remover/Installer (J-34757), push "C" ring partially off shaft, then rotate shaft and remove ring with needle-nose pliers. Ring can also be removed with 2 long thin screwdrivers.
2. Check final drive end play. See «FINAL DRIVE ASSEMBLY»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e) under COMPONENT DISASSEMBLY & REASSEMBLY. (Scheme 14) Remove final drive assembly and selective thrust washer and bearing. Remove final drive internal gear snap ring and internal gear from case.

DRIVE LINK ASSEMBLY

Note. (Scheme 30)for exploded view of all internal components (from drive link support to final drive assembly). (Scheme 31)for thrust washer and bearing locations. (Scheme 32)for lip seal locations.

1. Remove "O" ring from turbine shaft. (Scheme 33) Remove turbine shaft drive sprocket, driven sprocket and drive link chain together as an assembly. Note position of Copper-colored link on drive link chain; it should be installed facing up.
2. Remove drive sprocket and driven sprocket thrust washers from between sprockets and channel plate. Remove chain scavenging scoop and driven sprocket support with 4th clutch thrust washer.

INPUT & 2ND CLUTCH ASSEMBLIES

1. Using Final Drive/Clutch Assembly Remover/Installer (J-33381), remove 2nd clutch and input shaft clutch housings as an assembly. (Scheme 10) Remove reverse band if it did not come out with 2nd clutch housing.
2. Separate 2nd clutch housing from input clutch housing. Remove thrust washer and thrust bearing from input housing. Install input clutch housing and shaft assembly into transaxle case. Install Loading Tool (J-26958) to transaxle case. (Scheme 11)
3. Install differential thrust washer, thrust bearing and rear extension housing. Using feeler gauge, measure input clutch housing end play using End Play Gauge (J-33386). Record measurements for proper end play clearances during reassembly. (Scheme 11)
4. Fit proper selective thrust washer and measure clearance. Record measurement, and set aside proper selective washer for reassembly. Remove transaxle components and loading tool. For thrust washer identification and sizes, see «INPUT CLUTCH THRUST WASHER IDENTIFICATION»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e) under TRANSAXLE REASSEMBLY.

Scheme 10

Scheme 11

INPUT SPRAG, SUN GEARS & 3RD ROLLER CLUTCH ASSEMBLIES

Remove input clutch sprag assembly, 3rd roller clutch assembly and input sun gear. Remove reverse reaction drum, input carrier assembly and thrust bearing. Remove reaction carrier, reaction sun gear/drum assembly and 1-2 band. Remove reaction sun gear thrust bearing and final drive output shaft. Remove forward band. DO NOT clean bands in solvent.

Cleaning & Inspection

Clean transaxle case thoroughly with solvent, and then air dry. Inspect transaxle case for damage to band lugs, snap ring grooves and drive sprocket bearings. Check for interconnected or damaged oil passages and servo bores. Inspect case for stripped threads in bolt holes or casting porosity. Repair or replace case if necessary.

Drive Sprocket Support

1. If removal of drive sprocket bearing from case is necessary, use Bearing Puller (J-26941) and Slide Hammer (J6125-1B). (Scheme 12) Remove support bearing, and install NEW bearing with Bearing Installer (J-28677) and Driver Handle(J-8092).
2. If drive sprocket support replacement is necessary, remove attaching screws and remove support. Install NEW support, and tighten attaching screws to specification. See «TORQUE SPECIFICATIONS»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e__torque-specifications).

Note. DO NOT remove these parts unless replacement is necessary.

Manual Shaft, Detent Lever & Actuator Rod

If manual shaft, detent lever or actuator rod removal is necessary, remove pin and lock nut from manual shaft. Remove actuator rod from detent lever. Remove retaining pin from case. Remove actuator rod assembly from case. Remove "O" ring from actuator rod guide.

Scheme 12

Disassembly & Inspection

1. Inspect final drive internal gear for damaged teeth, worn bearing surfaces, broken parking pawl spring or damage to parking pawl. Inspect sun gear, thrust bearings, parking gear and speed sensor rotor for wear or damage.
2. Check final drive carrier pinion gears for excessive end play. Use a feeler gauge and measure end play between carrier and pinion gear thrust washer. End play should be.009-.025" (.24-.63 mm).
3. Using a pin punch, drive differential pinion shaft retainer pin from carrier. Remove pinion shaft, pinion and side gears, and thrust washers. (Scheme 13) Inspect all parts for damage or abnormal wear. Inspect final drive sun gear shaft for damaged splines or journals.

Reassembly

1. Assemble differential side gears and thrust washers into carrier. Using petroleum jelly, stick thrust washers onto pinion gears. Assemble pinion gears and washers into carrier.
2. Slide pinion shaft through both pinion gears for alignment, then remove shaft. Rotate pinion gears into position, then install pinion shaft. Tap retaining pin into position using a plastic hammer.
3. Tap speed sensor rotor (if removed) into position using soft mallet. Install sun gear with stepped side facing parking gear. Assemble parking gear on sun gear.
4. Inspect carrier-to-case selective thrust washer for damage. Install thrust washer onto carrier hub. Install thrust bearing onto thrust washer and retain with petroleum jelly.
5. Assemble thrust bearing on internal gear. Install internal gear to case and install snap ring. Move detent lever out of "P" position. Install final drive assembly into case.
6. To measure final drive end play, install dial indicator so pointer contacts Adapter (J-26958-10). (Scheme 14) Lift speed sensor rotor with Snap Ring Remover (J-28585), and read dial indicator.
7. Correct end play is.008-.025" (.20-.63 mm). If necessary, adjust end play with selective carrier-to-case thrust washer. See «CARRIER-TO-CASE SELECTIVE THRUST WASHER SIZES»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e).

CARRIER-TO-CASE SELECTIVE THRUST WASHER SIZES

Scheme 13

Scheme 14

Inspection & Reassembly

Inspect final drive sun gear shaft for damaged splines or journals. (Scheme 30) Install thrust bearing. Install final drive sun gear shaft into final drive, ensuring splines engage with parking gear and sun gear.

DO NOT wash bands in solvent. Inspect 1-2 and forward band assembly for heat damage, lining cracks and separation. Check band stop for damage and replace if necessary.

Inspect reaction carrier and reaction drum for damaged teeth, scoring or warpage. Check thrust bearing for damage. Using a feeler gauge, check reaction carrier pinion gear end play. End play should be .009-.030" (.23-.77 mm). Check for damage to reaction carrier internal gear.

1. Install reaction sun gear-to-final drive internal gear thrust bearing, positioning inner race against internal gear. Assemble reaction sun gear and drum assembly onto final drive internal gear.
2. Install reaction carrier-to-sun gear thrust bearing, positioning inner race against reaction carrier. Retain bearing with petroleum jelly. Install reaction carrier, rotating carrier until pinions engage sun gear.

Check input carrier pinion gears for proper end play. Pinion gear end play should be .009-.030" (.23-.77 mm). Inspect internal gear and pinion gears for worn or damaged teeth, and ensure pinions rotate freely. Inspect thrust bearing for damage (thrust bearing cannot be removed from carrier).

Install thrust bearing with inside race against carrier. Retain thrust bearing with petroleum jelly. Install input carrier into case, and rotate into position.

Inspect reverse reaction drum for damaged teeth and distortion. Install reverse reaction drum, ensuring spline teeth engage input carrier. DO NOT wash reverse band in solvent. Inspect reverse band assembly for damage and replace if necessary.

Disassembly

Remove spiral lock ring from inner race and retainer assembly. Remove 3rd sprag and input sprag assemblies from inner race and retainer assembly. Disassemble inner race and retainer assembly, and input sun gear spacer from input sun gear. (Scheme 15) Remove input sprag assembly from outer race. Note sprag cage direction for installation reference. Remove end bearing from outer race.

Scheme 15

Inspect 3rd sprag outer race for scoring and wear. Inspect assemblies for damaged rollers and springs. Install any loose roller by depressing spring and inserting roller. Inspect input sprag inner and outer races for damage. Check sprag assembly for damaged sprags or cages. Check sprag cage for distortion or broken tabs. Inspect input sun gear splines and bushing for damage.

1. Position 3rd sprag outer race on bench with lube dam side down. Install center bearing into 3rd clutch outer race. Lip on sprag cage should be in up position. Install end bearing into outer race.
2. Position input sprag outer race flat on bench with lube dam side up. Install end bearing into outer race. Install 3rd sprag assembly into outer race, noting direction of sprag assembly. Install sun gear spacer onto input sun gear. Install input sprag and 3rd sprag assemblies onto inner race. Install retainer onto inner race. (Scheme 15)
3. Install NEW spiral lock ring onto sprag inner race. Spiral lock ring must be seated in groove on inner race. Tabs and slots on lock ring will lock. Install 3rd sprag and input sprag assemblies onto input sun gear. Ensure input sprag and 3rd sprag assemblies rotate in correct direction. (Scheme 16)

Scheme 16

INPUT CLUTCH & 3RD CLUTCH ASSEMBLY

Note. Input clutch plates have been revised. Original design components are not available as replacement parts and cannot be mixed with NEW design components. See INPUT CLUTCH PLATE UPDATE .

1. Remove input shaft thrust washer and input clutch backing plate snap ring. Remove input clutch backing plate. Remove input clutch steel and composition plates. Remove input clutch apply plate.
2. Remove 3rd clutch backing plate snap ring and backing plate. Remove 3rd clutch steel and composition plates. (Scheme 17) Remove 3rd clutch sprag retainer snap ring. Using Clutch Spring Compressor (J-23327) and Adapter (J-25018-A), compress and remove spring retainer.
3. Remove 3rd clutch piston from housing. Remove 3rd clutch piston inner seal from shaft. Compress piston housing, and remove snap ring. Remove "O" ring. Remove spring and retainer assembly. Remove input clutch piston and inner seal.

Inspect all clutch plates for cracks, wear, lining separation, pits or other signs of damage. Inspect thrust washer for damage. Inspect input clutch housing and shaft for interconnected oil passages, damaged clutch hub, worn bushings, or damaged 3rd clutch shaft seal or oil seal rings.

Input Shaft Seal Replacement

1. Remove solid oil seal rings from input shaft. Inspect seal ring grooves for nicks or burrs. Lubricate each oil seal ring, and position them one at a time on Seal Protector (J-34741-1). (Scheme 18)
2. Quickly slide each seal into ring groove when protector is in position. Use Seal Driver (J-34741-2) to push ring over seal protector. Size seal with Seal Sizer (J-34741-3). Gently twist seal sizer over each seal. Leave sizer in place until installation.

Retainer & Ball Assembly Replacement

Remove retainer and ball assembly from housing using a 1/4" drift. Install NEW retainer and ball assembly.

Piston Seal Replacement

Remove seals from input clutch piston or 3rd clutch piston. Lubricate NEW seals with ATF, and install seals.

1. Lubricate input clutch piston inner seal with ATF, and install seal using Seal Protector (J-37361). Assemble input piston into input housing. Assemble "O" ring seal onto input shaft.
2. Install spring retainer and guide in piston. (Scheme 17) Install 3rd clutch piston housing into input housing. Using spring compressor, compress 3rd clutch housing, and install snap ring. Install 3rd clutch inner seal. Install 3rd clutch piston into housing. Compress 3rd clutch spring retainer, and install snap ring.
3. Install wave plate. Assemble 3rd clutch plates; start with steel plate, and then alternate between composition and steel plates. Install 3rd clutch backing plate with stepped side facing up. Install snap ring.
4. Assemble input clutch plates; start with composition plate, and then alternate between steel and composition plates. Install input clutch backing plate with tapered teeth side facing up.
5. Install snap ring. Apply air pressure to oil passages in input shaft, and check for proper operation of clutch assembly. Air pressure must not exceed 20 psi (1.4 kg/cm 2 ).

Input Clutch Plate Update

1. Beginning August 22, 1994, (Julian Date 234), all 1995 4T60-E transaxles were produced with composition and steel input clutch plates using a revised thickness. Original design steel plates are no longer available from manufacturer. Revision greatly improves durability of input clutch plates.
2. Revised composition plate is thinner by about .026" (.0010 mm) to accommodate thicker steel plate. Composition plate is about .065" (.0025 mm) thick. Original design composition plate is about .091" (.0036 mm) thick.
3. Revised steel plate is thicker by about .020" (.0007 mm) to improve heat displacement and durability. Plate is about .070" (.0028 mm) thick. Original design plate is about .050" (.0020 mm) thick. Revised steel plate is same as used on 3T40 transaxle.
4. Revised Input Clutch Pack (24203185) will service all 1991-95 4T60-E transaxles. Clutch pack also will service 4T60 transaxles from late 1990 (Julian Date 016 and later) through 1993. These transaxles have had the input clutch accumulator eliminated and a wave plate added to input clutch housing.
5. Clutch pack CANNOT be used on 4T60 transaxles prior to Julian Date 016. Original design and revised clutch plates CANNOT be mixed. For input clutch plate part numbers, see «INPUT CLUTCH PLATE PART NUMBERS»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e) .

INPUT CLUTCH PLATE PART NUMBERS

Scheme 17

Scheme 18

Remove snap ring and backing plate. (Scheme 19) Remove clutch plates, waved plate and snap ring. Remove apply ring and spring return assembly. Remove apply piston.

1. Inspect steel and composition plates for wear, lining separation, pitting or damage. Inspect apply ring and spring return for damage. Inspect piston and piston seals for damage.
2. Inspect 2nd clutch housing for damaged inner piston seal. Inspect for damaged bushings and spline teeth. Check for scored band surface. Check retainer and ball assembly for damage. Inspect housing for warpage.

Remove seal from 2nd clutch piston. Lubricate NEW seal with ATF and install.

Remove retainer and ball assembly from housing using a 1/4" drift. Tap in NEW retainer and ball assembly using drift.

Assemble piston into housing. Install apply ring and spring return. Install snap ring and wave plate. Assemble clutch plates; start with composition plate, and then alternate between steel and composition plates. Install backing plate and snap ring. Apply 20-psi (1.4 kg/cm 2 ) air pressure to passage marked "2" to check clutch operation.

Scheme 19

Compress spring return using a press, and remove snap ring. Remove retainer and 4th clutch piston from sprocket support.

Inspect driven sprocket support for worn or damaged oil seal rings. Check bushing and piston seal surface for damage. Check for blocked or interconnected oil passages and cup plug. Check chain scavenging scoop and baffle for cracks. Inspect piston, seals and thrust washer for damage. Check spring retainer for distorted springs. Inspect driven sprocket bearing for damage.

Inspect output shaft snap ring groove, splines, journal and bearings for damage. Replace if necessary.

Inspect drive and driven sprockets for damaged or chipped teeth. Pull drive link chain toward transaxle case. Measure distance between drive link chain and transaxle case. Replace drive link chain if measurement is less than 1/8". Check sprockets for damaged bearing surfaces or splines. Check thrust washers and drive link for excessive wear or damage. Inspect 4th clutch shaft and turbine shaft for damaged bushings, splines or seals. Replace if necessary.

Drive Link Chain Design Update

1. 1995-96 vehicles equipped with 4T60-E transaxle are equipped with 2 NEW design rocker joint drive link chains. First design ("Elastically Tuned") fits all models except Aurora and Riviera. This drive link chain has strength improvements to improve high-mileage durability.
2. Drive link chain can be identified by the "Mouse Ears" shape of outer guide links and has one Copper colored master link. (Scheme 33) Drive link chain may replace original design rocker joint drive link chain on all 1993-95 vehicles. On all 1991-93 vehicles equipped with 4T60-E transaxle with round pin design drive link chain, drive link chain, drive sprocket and driven sprocket MUST be updated to NEW design. See «DRIVE LINK CHAIN & SPROCKET PART NUMBERS»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e).
3. Aurora and Riviera are equipped with second design rocker joint drive link chain specifically designed to reduce noise. (Scheme 33) Chain is chordal compensating. Drive link chain can be identified by the 2 Copper colored master links. Internal links have a slightly different profile. For drive link chain part numbers, see «DRIVE LINK CHAIN & SPROCKET PART NUMBERS»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e).

DRIVE LINK CHAIN & SPROCKET PART NUMBERS

Thoroughly clean and air dry valve body. Remove each valve train, beginning with upper left hand corner. Cover bores when removing roll pins, because some valves are under spring pressure. Remove blind hole roll pins with a modified drill bit. Lay valves, springs and bushings on a clean surface in the order removed. (Scheme 20)

Clean valves, springs and bushings in solvent. DO NOT use shop rags to clean valve body components. Inspect valves and bushings for scoring, nicks and scratches. Inspect springs for damaged or distorted coils. Inspect valve body casting for porosity, interconnected oil passages and damaged machined surfaces.

To reassemble valve body components, reverse disassemble procedure. Ensure all components are installed in original locations.

Scheme 20

Clean and air dry oil pump. Remove oil pump cover bolts. Remove vane rings, vanes and rotor. Remove seal and springs. Remove slide, slide seal support and slide seal. Remove pivot pin.

1. Inspect pump body for porosity, interconnected oil passages, or damaged inner pump area surface or machine facing. Check slide, springs, rotor and vanes for damage. Inspect slide seal, slide support and seals for damage. (Scheme 9)
2. Measure undamaged area of rotor, vane or slide to check for proper size. See «OIL PUMP COMPONENT THICKNESS»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e). (Scheme 21) En sure replacement parts are matched to fit within specification.

Note. Oil pump components are matched sets. DO NOT mix old and new parts.

OIL PUMP COMPONENT THICKNESS

Install vane rings onto pump pocket. Install pump slide into pump body. Install seal and support into slide. Install inner priming spring into outer priming spring. Press both springs into pump body. Install "O" ring and seal ring onto slide. (Scheme 9) Install rotor into pump body. Install vanes into rotor slots, ensuring vanes are flush with top of rotor. Install pump cover onto body using cover bolts. Install pump pressure screen into pump (screen has one-way tab).

Scheme 21

Thermo Element Replacement

If thermo element replacement is necessary, remove retainers, pins and thermo element. Remove plate element. For NEW element, set thermo pin height with Height Gauge (J-34094-A). (Scheme 22) Install element plate. Install pin and retainer assemblies, and set height with height gauge. Install NEW thermo element.

Scheme 22

Inspect servo pistons and seals for damage or cracks. DO NOT remove seals unless replacement is required. Inspect springs for damaged coils.

DO NOT interchange servo parts. Assemble spring retainer onto pin. Forward servo spring retainer step must face spring. Reverse servo cushion spring must be installed between 2 spring retainers. Install cushion spring, servo piston and snap ring onto pin. (Scheme 7)and (Scheme 8).

TRANSAXLE REASSEMBLY

Note. (Scheme 30)- (Scheme 33) for disassembly and reassembly reference.

Note. All selective snap ring and thrust washer measurements taken during disassembly must be rechecked at appropriate reassembly stage.

Scheme 23

Scheme 24

Scheme 25

Scheme 26

Scheme 27

Scheme 28

Scheme 29

1. Install and ensure sun gear shaft, forward band, 1-2 band, reaction sun gear and reverse reaction drum are in place. Ensure 1-2 band anchor pins engage band, and 1-2 band assembly stop is in place.
2. Recheck final drive end play. See «FINAL DRIVE ASSEMBLY»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e) under COMPONENT DISASSEMBLY & REASSEMBLY. Install thrust washer onto input shaft and hold in position with petroleum jelly. Install sprag, roller clutch and input sun gear assembly into input clutch assembly. Clutch hubs must engage clutch plates.
3. Install input clutch roller clutch and sprag assemblies into case using Final Drive/Clutch Installer (J-33381). DO NOT install 2nd clutch housing, thrust bearing or thrust washer at this time.
4. Check input clutch housing end play. See «INPUT & 2ND CLUTCH ASSEMBLIES»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e__input-2nd-clutch-assemblies) under TRANSAXLE DISASSEMBLY. (Scheme 11) Using feeler gauge, check clearance between thrust washer and end play gauge. Clearance must be.000-.006" (.000-.152 mm). If clearance is not as specified, use different thrust washer. See «INPUT CLUTCH THRUST WASHER IDENTIFICATION»(/buick/lesabre/vii-1992-1999/remont/automatic-trans/#automatic-transaxle-overhaul-testing-4t60-e). INPUT CLUTCH THRUST WASHER IDENTIFICATION Washer ID No. Color Thickness: In. (mm) 1 Orange/Green.114-.118 (2.90-3.00) 2 Orange/Black.120-.124 (3.05-3.15) 3 Orange.126-.130 (3.20-3.30) 4 White.132-.136 (3.35-3.45) 5 Blue.138-.142 (3.50-3.60) 6 Pink.144-.148 (3.65-3.75) 7 Brown.150-.154 (3.80-3.90) 8 Green.156-.159 (3.95-4.05) 9 Black.161-.165 (4.10-4.20) 10 Purple.167-.171 (4.25-4.35) 11 Purple/White.173-.177 (4.40-4.50) 12 Purple/Blue.179-.183 (4.55-4.65) 13 Purple/Pink.185-.189 (4.70-4.80) 14 Purple/Brown.191-.195 (4.85-4.95) 15 Purple/Green.197-.201 (5.00-5.10)
5. Install reverse reaction plate and thrust washer. Install thrust bearing with large race facing down. Install 2nd clutch assembly onto input clutch assembly. Clutch plates must engage input clutch hub, and clutch housing must engage reverse reaction drum splines.
6. Install reverse band into case, locating band on anchor pins. Install thrust washer to driven sprocket support, and hold washer in position with petroleum jelly. Install driven sprocket support into case, ensuring support lube hole aligns with hole in bottom of case. Install output shaft into case. Install "C" ring onto output shaft through bottom of case. Push "C" ring onto output shaft.
7. Coat Seal Installer (J-29569-1 and J-29829-1) with petroleum jelly, and place seal installer over turbine shaft. Slide oil ring seals into position. Using Seal Sizer (J-29569-2 and J-29829-1), size seals by gently twisting sizer over seal.
8. Install thrust washer onto drive sprocket, and hold washer in position with petroleum jelly. Install sprockets and drive link chain onto case. Ensure colored link faces upward.
9. Install thrust washer onto driven sprocket and retain with petroleum jelly. Insert 4th clutch hub and shaft through driven sprocket, and install clutch apply plate with identification mark facing down. (Scheme 23) Install 4th clutch plates starting with steel plate.
10. If necessary, pry out axle seal, and tap NEW seal into place. Install pistons and pins into channel plate. Install springs into case. Install channel plate gaskets and modulator port gasket. Install thrust washer onto channel plate.
11. Install channel plate onto case. Channel plate lugs must align with tangs on 4th clutch plates and apply plate. (Scheme 23) Install sleeve into channel plate. Install oil reservoir baffle, detent spring and roller. Install channel plate gaskets.
12. Install and tighten channel plate bolts. (Scheme 24) Install 4 check balls in channel plate, using petroleum jelly to retain check balls. (Scheme 25) Install converter clutch screen. Install detent spring and roller assembly.
13. Install NEW spacer plate/channel plate gasket onto channel plate using alignment pins. Install spacer plate onto gasket. Install NEW spacer plate/valve body gasket onto spacer plate. (Scheme 26)
14. Install oil pump drive shaft and converter clutch solenoid screen. Install 6 check balls into valve body assembly; use petroleum jelly to retain check balls in place. (Scheme 27)
15. Install valve body assembly onto channel plate using alignment pins. (Scheme 28) Install servo pipes into valve body using retainer and bolt. Install pump onto valve body assembly. Install pump attaching bolts. (Scheme 29)
16. Install gaskets onto case and channel plate. Install side cover. Install accumulator pins into case. Install accumulator springs into case. Larger springs are for 3-4 accumulator.
17. Install lube oil pipe retainer spring into pocket. Install lube oil pipe retainer onto lube oil pipe and "O" ring onto retainer. Install lube oil pipe into case. Ensure pipe is installed into driven sprocket support lube hole.
18. Install spacer plate and NEW gaskets onto case. install oil scavenger scoop. Install wiring to solenoids. Ensure wire connectors for solenoid "B" and TCC solenoid are connected correctly. To identify wire colors for TCC solenoid, look for diode in wiring harness under shrink wrap. If solenoid "B" and TCC solenoid wires are reversed, transaxle will shift into Reverse okay, but engine will stall immediately after transaxle is shifted into Drive.
19. Install accumulator cover, pipes and retainer onto case as an assembly. Ensure lube oil pipe and 2-1 manual servo pipe are installed correctly. The 2-1 manual servo pipe should be installed in accumulator housing center hole, and lube oil pipe should be installed in right side hole. (Scheme 6) Forward servo pipe cannot be installed in wrong hole due to a larger pipe diameter.
20. If pipes are installed incorrectly, lube oil will apply 2-1 manual servo and band as soon as engine is started. Vehicle will display a tie-up condition in Park and Reverse, and on a 2-3 upshift. Vehicle will move forward in Neutral if condition exist.
21. Ensure lube oil pipe is installed into final drive internal gear. Install NEW filter lip seal, filter and gasket into case. Install pan. Install forward and reverse servo return springs into proper servo bore. Assemble each servo and then install into case. Install NEW oil seal ring onto each servo cover. Install forward and reverse servo covers into case. Install snap ring and cover bolts.
22. Install speed sensor. Install modulator valve into case. Install NEW "O" ring seal onto modulator. Install modulator into case. Install retainer and bolt. Use Converter Holding Strap (J-21366) to hold torque converter in place for installation.

Scheme 30

Scheme 31

Scheme 32

Scheme 33

Scheme 34

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

TRANSAXLE SPECIFICATIONS

TRANSAXLE SPECIFICATIONS

WIRING DIAGRAMS

Note. See AUTO TRANS DIAGNOSIS - 4T60-E - 1995 article or AUTO TRANS DIAGNOSIS - 4T60-E - 1996 article.

See also:
• AUTO TRANS DIAGNOSIS - 4T60-E - 1995
• OIL PUMP & VALVE BODY
• CLUTCH & BAND APPLICATION CHART
• ROAD TEST
• HYDRAULIC PRESSURE TESTS
• SYMPTOM DIAGNOSIS
• HIGH OR LOW LINE PRESSURE
• TORQUE SPECIFICATIONS
• INPUT CLUTCH PLATE UPDATE
• INPUT & 2ND CLUTCH ASSEMBLIES