Case: Service and Repair

TRANSAXLE MOUNT, BRACKET, VALVE BODY COVER AND CASE COVER 3T40 (125C)

Valve Body Cover:

Side Cover And Control Valve View:

Fig. 8 Check Ball Locations:

Torque Converter Clutch Solenoid & Switches:

TOOL REQUIRED:
^ J 28467-A Engine Support Fixture

REMOVE OR DISCONNECT
1. Negative battery cable.
2. Air intake duct.
3. TV cable at throttle lever and from transaxle rod.
4. Power brake booster line and hose.
5. Install engine support fixture J 28467-A. Raise engine enough to take pressure from engine mounts.
6. Two bolts connecting engine mount to engine mount intermediate bracket.
7. Raise vehicle.
8. Front lower engine strut.
9. Lower the right suspension support by removing two front and two middle bolts and loosening two rear bolts.
10. Left front wheel and tire assembly.
11. Left splash shield.
12. Crossmember.
13. Left stabilizer bushing nuts.
14. Stabilizer shaft from left lower control arm.
15. Bolts supporting left suspension support.
16. Swing the suspension support control arm back on the ball joint and suitably support.
17. Transaxle cooler pipes and plug to prevent leakage.
18. P/S lines from P/S gear and plug to prevent leakage.
19. Trans axle mount to body bolts.
20. Lower engine/trans axle assembly just enough to be able to remove transaxle mount from bracket.
21. Transaxle mount.
22. Transaxle bracket.
23. Valve body cover and gasket.
24. TCC wires from case connector.
25. Control valve and oil pump assembly from case cover.
^ Do not lose check balls.
26. Oil pump drive shaft.
27. Spacer plate and gaskets.
28. Case cover.
^ Install two 12 x 1.95 x 14 bolts in dowel pin holes and tighten equally to pull case cover loose.

IMPORTANT
^ When disassembling a Hydra-Matic 3T40, inspect the drive link assembly for wear.

INSTALL OR CONNECT
1. Case cover.

TIGHTEN
^ Case Cover Bolts to 24 Nm (18 lb. ft.).

2. Check balls into case cover.
3. Spacer plate and gaskets.
4. Pump drive shaft.
5. Check ball into control valve assembly.
6. Auxiliary valve body and control valve assembly onto transaxle.
7. TCC wire to case electrical connector.
8. Valve body cover and gasket.




INSPECT
^ Bolts to determine if the washer is inverted.

IMPORTANT
^ Use adhesive/sealant compound GM P/N 12345282 or equivalent to reduce the potential for fluid leaks on bolts.




9. Transaxle bracket.
10. Transaxle mount to transaxle bracket. Do not tighten until mount is fastened to body.
11. Raise engine/transaxle assembly.




12. Transaxle mount to body bolts.

TIGHTEN
^ Tighten transaxle mount to bracket.

13. P/S lines to P/S gear.
14. Transaxle cooler lines.
15. Left suspension support.
16. Stabilizer shaft to left lower control arm.
17. Left stabilizer bushing nuts.
18. Crossmember.
19. Left splash shield.
20. Left front wheel and tire assembly.
21. Right suspension support.
22. Front lower engine strut.
23. Bolts connecting engine mount to engine mount intermediate bracket.
24. Remove engine support fixture J 28467-A.
25. Power brake booster line and hose.
26. TV cable at throttle lever and transaxle.
27. Air intake duct.
28. Negative battery cable.

ADJUST
^ P/S fluid level.
^ TV cable.
^ Fluid level.

INSPECT
^ Suspension alignment.
^ For fluid leaks.