Automatic Transmission - 4L60-E/4L65-E/4L70-E - Overhaul: Overhaul Chevrolet Silverado 1500

Retainer and Ball Assembly Leak Check

Tools Required

J 29714-A Servo Cover Compressor. See Special Tools .

Low and Reverse Clutch Support Disassemble

1. Remove the low and reverse roller clutch race (675) from the low and reverse clutch support (679). Inspect the race for damage and surface finish.
2. Remove the two low and reverse roller retainer rings (677) and the low and reverse roller clutch assembly (678). Inspect the roller clutch assembly for damaged rollers and broken springs.
3. Inspect the low and reverse clutch support (679) for loose cam and cam surface finish. Check the support for cracks and damaged lugs.
4. Clean and install the low and reverse roller clutch assembly (678) into the low and reverse clutch support (679). Install the low and reverse retainer ring (677).

Input Clutch Assembly Disassemble

Tools Required

1. J 23327-1 Forward Clutch Spring Compressor (Bridge). See «Special Tools»(ref-246428-S04847512592006122100000) .
2. J 23456 Booster and Clutch Pack Compressor. See «Special Tools»(ref-246428-S04847512592006122100000) .
3. J 25018-A Clutch Spring Compressor Adapter. See «Special Tools»(ref-246428-S04847512592006122100000) .

Input Housing and Shaft Assembly Assemble

Tools Required

1. J 23327-1 Forward Clutch Spring Compressor (Bridge). See «Special Tools»(ref-246428-S04847512592006122100000) .
2. J 23456 Booster and Clutch Pack Compressor. See «Special Tools»(ref-246428-S04847512592006122100000) .
3. J 25018-A Clutch Spring Compressor Adapter. See «Special Tools»(ref-246428-S04847512592006122100000) .
4. J 26744-A Seal Installer. See «Special Tools»(ref-246428-S04847512592006122100000) .
5. J 29882 Overrun Clutch Seal Protector. See «Special Tools»(ref-246428-S04847512592006122100000) .
6. J 29883 Forward Clutch Seal Protector. See «Special Tools»(ref-246428-S04847512592006122100000) .

1. Install a new input to forward clutch housing O-ring seal (622).
2. Inspect the 3rd and 4th clutch piston (623) for the following conditions: Porosity or damage Seal damage
3. Install the 3rd and 4th clutch piston (623) into the input housing.
4. Inspect the forward clutch housing (628) for the following conditions: Proper check ball operation Damage or distortion Burrs in the seal areas Cracks
5. Inspect the forward clutch piston for the following conditions: Porosity or damage Seal damage Apply leg damage
6. Install the forward clutch piston (630) into the forward clutch housing (628).
7. Install the 3rd and 4th spring assembly (626) into the 3rd and 4th clutch apply ring (625).
8. Install the forward clutch housing (628) and forward clutch piston (630) into the 3rd and 4th apply ring (625).
9. Install the J 29883 on the input housing. See «Special Tools»(ref-246428-S04847512592006122100000) .
10. Install the 3rd and 4th clutch apply ring and the forward housing and piston assembly using the following procedure: Hold the assembly by the 3rd and 4th clutch apply ring (625) legs during installation. Do not let the forward clutch piston (630) separate from the forward clutch housing. Firmly seat the assembly.
11. Remove the J 29883 from the input housing. See «Special Tools»(ref-246428-S04847512592006122100000) .
12. Inspect the overrun clutch piston (632) for the following conditions: Porosity or damage Seal damage Overrun clutch ball proper operation
13. Install the J 29882 on the input housing. See «Special Tools»(ref-246428-S04847512592006122100000) .
14. Install the overrun clutch piston (632) into the input housing.
15. Remove the J 29882 from the input housing. See «Special Tools»(ref-246428-S04847512592006122100000) .
16. Using the J 26744-A , carefully install the overrun clutch piston outer seal. See «Special Tools»(ref-246428-S04847512592006122100000) .
17. Install the overrun clutch spring (634) assembly.
18. Install the J 23327-1 and the J 25018-A , and compress the overrun clutch spring assembly using J 23456 . See «Special Tools»(ref-246428-S04847512592006122100000) .
19. Install the overrun clutch spring retainer snap ring (635).
20. Remove the J 23327-1 and the J 25018-A . See «Special Tools»(ref-246428-S04847512592006122100000) .

Scheme 452

Install a new input housing to output shaft seal (636).

Forward Clutch Sprag Disassemble

1. Remove the overrun clutch hub retaining snap ring (638).
2. Remove the overrun clutch hub (639).
3. Remove the forward sprag clutch inner race and input sun gear assembly (640).
4. Remove the sprag assembly retainer rings (643).
5. Remove the forward sprag assembly from the forward clutch outer race (644).

Forward Clutch Sprag Assemble

1. Inspect the forward sprag assembly (642) for the following conditions: Wear or damage Weak or broken springs
2. Inspect the forward clutch outer race (644) for the following conditions: Race wear or damage Spline wear Surface finish damage
3. Install the forward sprag assembly (642) into the forward clutch outer race (644).
4. Inspect the sprag assembly retainer rings (643) for wear or damage.
5. Install the sprag assembly retainer rings (643) into the forward clutch sprag assembly (644).
6. Inspect the forward sprag clutch inner race and input sun gear assembly (640) for the following conditions: Damaged spline or gear teeth Ring groove damage Surface finish damage Loose retainer Wear Cracks
7. Install the forward sprag clutch inner race and input sun gear assembly (640) into the forward sprag and outer race assembly.
8. Inspect the overrun clutch hub (639) for the following conditions: Spline damage Plugged lubrication holes Damaged tangs Cracks
9. Install the overrun clutch hub (639) onto the sprag clutch inner race and input sun gear assembly (640).
10. Install the overrun clutch hub retaining snap ring (638).
11. Test the forward clutch sprag assembly for proper operation. Position the forward clutch sprag assembly with the input sun gear facing up. IMPORTANT: The sun gear should only rotate in a counterclockwise direction. Hold the forward sprag clutch outer race (644) with one hand and rotate the input sun gear (640) with the other hand.
12. Install the forward clutch sprag and input sun gear assembly into the input clutch housing.
13. Index the overrun clutch hub into the overrun clutch plates.

Forward Clutch Assembly Assemble

1. Inspect the forward clutch waved plate (648), the apply plate (646), the fiber plate assemblies (649B), the steel plates (649A) and the selective backing plate (650) for the following conditions: Damaged tangs Delamination Excessive wear Heat damage Flatness Surface finish damage Burrs and nicks
2. Install the forward clutch apply plate (646).
3. Install the forward clutch waved plate (648).
4. Install the forward clutch steel plates (649A) and alternate with the fiber plate assemblies (649B).
5. Install the forward clutch selective backing plate (650).
6. Install the forward clutch backing plate retainer ring (651).

3-4 Clutch Assemble

1. Inspect the 3rd and 4th clutch apply plate (653), the fiber plate assemblies (654A), the steel plates (654B) and the selective backing plate (655) for the following conditions: Damaged tangs Delamination Excessive wear Heat damage or wear Surface finish Flatness
2. Install the 3rd and 4th clutch apply plate (653) into the input housing. Index each leg of the apply plate into the apply ring legs.
3. Install the 3rd and 4th clutch plates starting with a fiber plate assembly (654A) and alternate with a steel plate (654B).
4. Continue the stack up if seven 654A plates are used.
5. Inspect the five 3-4 clutch boost spring assemblies (600) for damaged, worn, broken or missing springs. Springs must be held securely by retainer.
6. Install the 3-4 clutch boost spring assemblies (600) into the input housing.
7. Install the 3rd and 4th clutch selective backing plate (655). Some models may have a chamfer on one side of the selective backing plate. Install the chamfer side up.
8. Install the 3rd and 4th clutch backing plate retainer ring (656).

Reverse Input Clutch Disassemble

Tools Required

1. J 23327-1 Forward Clutch Spring Compressor (Bridge). See «Special Tools»(ref-246428-S04847512592006122100000) .
2. J 25018-A Clutch Spring Compressor Adapter. See «Special Tools»(ref-246428-S04847512592006122100000) .

1. Remove the reverse input clutch retaining ring (614).
2. Remove all reverse input clutch plates (611-613).
3. Install the J 23327-1 and the J 25018-A . See «Special Tools»(ref-246428-S04847512592006122100000) .
4. Compress the reverse input clutch spring assembly.
5. Remove the reverse input clutch spring retainer ring (610).
6. Remove the reverse input clutch spring assembly (609).
7. Remove the reverse input clutch piston assembly (607).

Reverse Input Clutch Assemble

Tools Required

1. J 23327-1 Forward Clutch Spring Compressor (Bridge). See «Special Tools»(ref-246428-S04847512592006122100000) .
2. J 25018-A Clutch Spring Compressor Adapter. See «Special Tools»(ref-246428-S04847512592006122100000) .
3. J 44571-1 Reverse Input Clutch Piston Installer. See «Special Tools»(ref-246428-S04847512592006122100000) .

1. Inspect the reverse input clutch piston (607) for the following: Damaged or porosity Ring groove damage
2. Install the reverse input clutch inner and outer seals (608) on the piston.
3. Install the J 44571-1 inner (2) and outer (1) reverse input clutch piston installer. See «Special Tools»(ref-246428-S04847512592006122100000) .
4. Install the piston (607 into the housing (605).
5. Remove the J 44571-1 . See «Special Tools»(ref-246428-S04847512592006122100000) .
6. Inspect the reverse input clutch spring assembly (609) for bent, broken, distorted or damaged springs.
7. Install the reverse input clutch spring assembly (609).
8. Install the J 23327-1 and the J 25018-A . See «Special Tools»(ref-246428-S04847512592006122100000) .
9. Install the reverse input clutch spring retainer ring (610).
10. Inspect the belleville plate (611), the fiber plate assemblies (612B), the steel turbulator plates (612A) and the selective backing plate (613) for the following items: Damaged tangs Delamination Excessive wear Heat damage or wear Surface finish Flatness
11. Install the reverse input clutch belleville plate (611), with the inner diameter up, into the reverse input clutch housing and drum assembly (605).
12. Install the reverse input clutch plates starting with a steel turbulator plate (612A) and alternate with a fiber plate assembly (612B).
13. Install the reverse input clutch selective backing plate (613).
14. Install the reverse input clutch retaining ring (614).

Oil Pump Disassemble

1. Remove the thrust (pump to drum) washer (601).
2. For pump assemblies with an ISS hole plug (248), remove plug bolt (247) and ISS hole plug (248).
3. Remove the O-ring (249) and discard.
4. Remove the pump cover bolts (233).
5. Remove the pump cover (215) from the pump body (200).

Oil Pump Body Disassemble

1. Remove the pump slide outer spring (245).
2. Place a rag over the spring while removing to prevent the spring from flying out.
3. Remove the oil pump rotor (212) and pump vane rings (210).
4. Remove the pump vanes (213).
5. Remove the rotor guide (211).
6. Remove the pump slide (203), pump slide support seal (208) and the pump slide seal (209).
7. Remove the slide seal back-up O-ring seal (202) and the oil seal - slide to wear plate, ring (201).
8. Remove the pivot slide pin (205) and the pivot pin spring (204).

Oil Pump Body Assemble

Tools Required

1. J 25016 Pump Seal and Speedometer Gear Installer. See «Special Tools»(ref-246428-S04847512592006122100000) .
2. J 36850 Transjel Lubricant. See «Special Tools»(ref-246428-S04847512592006122100000) .

1. Using the J 25016 (1), install the oil seal assembly (243). See «Special Tools»(ref-246428-S04847512592006122100000) .
2. Install the front helix retainer (244).
3. Install an O-ring seal (202) and oil seal ring (201) into the groove on the back side of the pump slide (203).
4. Use J 36850 , or an equivalent, to retain the seal and the ring on the slide. See «Special Tools»(ref-246428-S04847512592006122100000) .
5. Install the pivot pin spring (204) and the pivot pin (205).
6. Install the pump slide (203).
7. Index the slide notch with the pivot pin (205). The oil seal ring must face downward into the pump pocket.
8. Install the pump slide seal support (208) and the pump slide seal (209).
9. Install the fluid pump slide outer spring (245).
10. Install the bottom pump vane ring (210) and the rotor guide (211) into the rotor (212) and retain with J 36850 or an equivalent. See «Special Tools»(ref-246428-S04847512592006122100000) .
11. Install the rotor (212) with the rotor guide (211) toward the pump pocket.
12. Install the pump vanes (213).
13. Install the top pump vane ring (210).

Oil Pump Cover Disassemble

1. Remove the oil pump reverse boost valve retaining ring (221).
2. Remove the reverse boost valve sleeve (220) and the reverse boost valve (219).
3. Remove the pressure regulator isolator spring (218) and the pressure regulator valve spring (217).
4. Remove the pressure regulator valve (216).
5. Remove the oil pump converter clutch valve retaining ring (222).
6. Remove the stop valve (223) and the converter clutch valve (224).
7. Remove the converter clutch valve (246).
8. Remove the pressure relief bolt rivet (227).
9. Remove the pressure relief spring (229) and the pressure relief ball (228).
10. Remove the oil pump cover screen (232) and the oil pump cover screen seal (231).
11. Remove the stator shaft oil seal rings (230).

Oil Pump Cover Assemble

Tools Required

1. J 38735-3 Pusher. See «Special Tools»(ref-246428-S04847512592006122100000) .
2. J 39855 Stator Shaft Seal Installer. See «Special Tools»(ref-246428-S04847512592006122100000) .

1. Using the J 39855-1 (1) which is part of kit J 39855 and the J 38735-3 (3), install the stator shaft oil seal rings (230). See «Special Tools»(ref-246428-S04847512592006122100000) .
2. Place J 39855-2 (2) which is part of kit J 39855 over the seals. See «Special Tools»(ref-246428-S04847512592006122100000) .
3. Leave J 39855-2 (2) which is part of kit J 39855 on the stator shaft until just before the pump is to be installed into the transmission. See «Special Tools»(ref-246428-S04847512592006122100000) .
4. Install the pressure relief ball (228) and pressure relief spring (229).
5. Install the pressure relief bolt rivet (227).
6. Install the oil pump cover screen seal (231) on the oil pump cover screen (232).
7. Install the oil pump cover screen (232) into the pump cover.
8. Install the converter clutch valve (246).
9. Install the converter clutch valve (224).
10. Install the stop valve (223) and the oil pump converter clutch valve retaining ring (222).
11. Install the pressure regulator valve (216).
12. Install the pressure regulator isolator spring (218) and the pressure regulator valve spring (217).
13. Install the reverse boost valve (219) in the reverse boost valve sleeve (220).
14. Install the reverse boost valve and sleeve in the pump cover.
15. Install the oil pump reverse boost valve retaining ring (221).

Oil Pump Cover and Body Assemble

Tools Required

J 21368 Pump Body and Cover Alignment Band. See Special Tools .

1. Place the oil pump cover onto the oil pump body and put stator shaft through a hole in the bench.
2. Install the pump cover bolts (233) finger tight only.
3. Install the J 21368 . See «Special Tools»(ref-246428-S04847512592006122100000) .
4. Tighten the pump cover bolts (233). Tighten: Tighten the bolts to 24 N.m (18 lb ft).
5. Remove the J 21368 . See «Special Tools»(ref-246428-S04847512592006122100000) .

Control Valve Body Disassemble

1. Remove the manual valve (340).
2. Remove the forward accumulator cover bolts (364) and the forward accumulator cover (363).
3. Remove the forward accumulator spring (356), forward accumulator piston (354), and the forward accumulator pin (355).
4. Remove the low overrun valve spring (362) and the low overrun valve (361).
5. Remove the coiled spring pin (360) and the bore plug (359).
6. Remove the forward abuse valve spring (358) and the forward abuse valve (357).
7. Remove the solenoid retainer (395) and the 1-2 shift solenoid (367A).
8. Remove the 1-2 shift valve (366) and the 1-2 shift valve spring (365).
9. Remove the solenoid retainer (395) and the 2-3 shift solenoid (367B).
10. Remove the 2-3 shuttle valve (369) and the 2-3 shift valve (368).
11. Remove the coiled spring pin (360).
12. Remove the 1-2 accumulator valve sleeve (372).
13. Remove the 1-2 accumulator valve (371) and the 1-2 accumulator valve spring (370).
14. Remove the solenoid retainer bolt (364A) and the solenoid retainer (378). Remove the pressure control solenoid (377), note orientation upon removal.
15. Compress the actuator feed limit valve spring (375).
16. Remove the bore plug retainer (395) and release the spring slowly.
17. Remove the bore plug (376).
18. Remove the actuator feed limit valve spring (375) and the actuator feed limit valve (374).
19. Remove the solenoid retainer (395) and the 3-2 control solenoid (394).
20. Remove the 3-2 control valve (391) and the 3-2 control valve spring (392).
21. Remove the bore plug retainer (395) and the bore plug (381).
22. Remove the 3-2 downshift valve spring (390) and the 3-2 downshift valve (389).
23. Remove the coiled spring pin (360) and the bore plug (359).
24. Remove the reverse abuse valve spring (388) and the reverse abuse valve (387).
25. Remove the bore plug retainer (395) and the bore plug (381).
26. Remove the 3-4 shift valve spring (386) and the 3-4 shift valve (385).
27. Remove the bore plug retainer (395) and the bore plug (381).
28. Remove the regulator apply valve (380) and the regulator apply spring (397) and the isolator valve (398).
29. Remove the bore plug retainer (395) and the bore plug (381).
30. Remove the 3-4 relay valve (384) and the 4-3 sequence valve (383) and the 4-3 sequence valve spring (382).

1-2 Accumulator Disassemble

1. Blow air into the 1-2 accumulator housing (57) to remove the 1-2 accumulator piston (56).
2. Remove the 1-2 inner (104) and outer (54) accumulator springs.

1-2 Accumulator Assemble

1. Inspect the 1-2 accumulator piston (56) for the following conditions: Porosity Cracks Scoring Nicks and Scratches
2. Install a 1-2 accumulator piston oil seal ring (55) on the 1-2 accumulator piston (56).
3. Inspect the 1-2 accumulator housing for the following conditions: Porosity Cracks Scoring Nicks and Scratches Debris or blocked passages
4. Install the 1-2 inner (104) and outer (54) accumulator springs.
5. Install the 1-2 accumulator piston (56).

2-4 Servo Disassemble

Tools Required

J 22269-01 Accumulator and Servo Piston Remover. See Special Tools .

1. Use a J 22269-01 to compress the second apply piston assembly (17). See «Special Tools»(ref-246428-S04847512592006122100000) .
2. Remove the second apply piston retaining ring (14).
3. Remove the servo cushion spring retainer (15), the servo cushion outer spring (16) and the servo cushion inner spring (105) (model dependent).

Transmission Fluid Pressure (TFP) Manual Valve Position Switch Assembly

The TFP manual valve position switch consists of five fluid pressure switches: D2 and D3 are normally closed and D4, Lo and Rev are normally open. All fluid circuits routed to the assembly are empty and the TFP manual valve position switch signals the PCM that the transmission is in either Park or Neutral.

Reverse input fluid pressure closes the normally open reverse switch in the TFP manual valve position switch This signals the PCM that the manual valve is in the Reverse (R) position.

Reverse input fluid exhausts from the TFP manual valve position switch. With no other fluid routed to it, the TFP manual valve position switch signals the PCM that the transmission is operating in either Park or Neutral.

Scheme 453

D4 fluid pressure is routed to the TFP manual valve position switch and closes the normally open D4 fluid pressure switch. This signals the PCM that the transmission is operating in Overdrive range.

2-4 Servo Assembly

The 2nd clutch fluid pressure moves the #8 checkball, flows through orifice #16 and fills the 2nd clutch fluid circuit. This orifice helps to control the 2-4 band apply rate.

3rd accumulator fluid pressure acts on the release side of the 2nd apply piston and assists servo return spring force. The surface area on the release side of the piston is greater than the surface area on the apply side. Therefore, 3rd accumulator fluid pressure and servo return spring force move the 2nd apply piston against 2nd clutch fluid pressure. This action serves two functions

1. Move the apply pin to release the 2-4 band.
2. Act as an accumulator by absorbing initial 3-4 clutch fluid to cushion the 3-4 clutch apply rate. Remember that the 3rd accumulator fluid circuit is fed by 3-4 clutch fluid.

4th fluid is routed through the center of the servo apply pin and acts on the apply side of the 4th apply piston. 4th fluid pressure moves the 4th apply piston against the apply pin spring force acting on the release side of the 4th apply piston. This action moves the apply pin and applies the 2-4 band in order to obtain fourth gear.

3-4 Accumulator Assembly

3-4 accumulator fluid pressure moves the 3-4 accumulator piston against spring force and orificed accumulator fluid pressure. This action absorbs initial 4th clutch apply fluid pressure in order to cushion the 2-4 band apply. Remember that both of the 3-4 accumulator and 4th fluid circuits are fed by servo feed fluid. As 3-4 accumulator fluid fills the accumulator, any air in the system will exhaust through office #19. This piston movement forces some orificed accumulator fluid out of the 3-4 accumulator assembly.

The 4th fluid exhausts from the 4th apply piston in the servo assembly. The apply pin spring moves the 4th apply piston and the apply pin in order to release the band from the reverse input drum and shift the transmission into third gear.

The 3-4 accumulator fluid exhausts from the 3-4 accumulator piston. The orificed accumulator fluid pressure and the spring force move the piston into a third gear position.

The 3rd accumulator fluid exhausts from the servo assembly. The 2nd clutch fluid pressure moves the 2nd apply piston against the servo return spring force in order to move the apply pin and apply the 2-4 band.

D3 fluid is routed to the TFP manual valve position switch and opens the normally closed D3 fluid pressure switch. The combination of the opened D3 switch and the closed D4 switch signals the PCM that the transmission is operating in Manual Third.

The D2 fluid is routed to the TFP manual valve position switch where it opens the normally closed D2 fluid pressure switch. With the D2 and the D3 pressure switches closed and the D4 pressure switch open, the TFP manual valve position switch signals the PCM that the transmission is operating in manual second.

Lo fluid is routed to the TFP manual valve position switch where it closes the normally open lo pressure switch. The addition of the lo pressure switch being closed signals to the PCM that manual first is selected.

The 2nd clutch fluid, which was fed by the 2nd fluid, exhausts from the servo. This allows the spring force from the servo cushion and the servo return springs to move the 2nd apply piston and apply the pin to release the 2-4 band. These spring forces help control the 2-4 band release.

1-2 Accumulator Assembly

The 2nd clutch fluid also exhausts from the 1-2 accumulator assembly. The spring force and the accumulator fluid pressure move the accumulator piston to assist the 2nd clutch fluid exhaust.