Transmission Replacement

Transmission Replacement

Removal Procedure





Warning: Refer to Battery Disconnect Warning Service Precautions.


1. Disconnect the battery negative cable assembly from the battery negative terminal.

2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.

3. Support the vehicle with safety stands.

4. Disconnect the range selector cable from the transmission bracket and from the range selector lever.

5. If equipped with all wheel drive (AWD), remove the transfer case. Refer to Transfer Case Assembly Replacement .

6. Remove the rear propeller shaft. Refer to One-Piece Propeller Shaft Replacement One-Piece Propeller Shaft Replacement or Two-Piece Propeller Shaft Replacement Two-Piece Propeller Shaft Replacement.

7. Support the transmission with a transmission jack.

8. Remove the transmission support crossmember. Refer to Transmission Support Crossmember Replacement Service and Repair.

9. Remove the exhaust pipe from the exhaust manifolds and the muffler assembly from the exhaust pipe. Refer to Catalytic Converter Replacement (L20,LMF) Service and RepairCatalytic Converter Replacement (V6) Service and RepairCatalytic Converter Replacement (LGH) Service and RepairCatalytic Converter Replacement (LC8,L96) Service and Repair.




10. Remove the starter motor. Refer to Starter Replacement (Diesel) Starter Replacement (Diesel)Starter Replacement (V8) Starter Replacement (V8)Starter Replacement (V6) Starter Replacement (V6).

11. Remove the converter sight shield.

12. Mark the flywheel and the torque converter alignment.





Note: For 4.3L engine, remove the starter opening shield in the starter motor mounting port in order to access the torque converter to engine flywheel bolts.

13. Remove the bolts that attach the torque converter to the engine flywheel.




14. Remove the transmission vent hose and the wiring harness from the transmission.

15. Remove the transmission fluid fill tube and the fill tube seal from the transmission. Refer to Transmission Fluid Filler Tube and Seal Replacement 4L60-E/4L65-E/4L70-E - Automatic Transmission.

16. Plug the fluid fill tube opening in the transmission.

17. Disconnect the transmission oil cooler pipes from the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Replacement Transmission Fluid Cooler Hose/Pipe Replacement.

18. Plug the transmission oil cooler pipe connectors in the transmission case.




19. Disconnect the wiring harness connectors from the transmission vehicle speed sensor and the park/neutral position switch.

20. Remove all vehicle harness wires, harness clips, tubes, brackets, and lines that may interfere with the removal of the transmission from the vehicle.




21. Remove the studs and the bolts securing the transmission to the engine.

22. Pull the transmission straight back.

23. Remove the transmission from the vehicle.

24. Inspect all the components for wear and damage.

25. Inspect all the seals and the fittings for signs of wear.

26. Inspect the torque converter for stripped or broken weld nuts.

27. Inspect the transmission case for cracks.

28. Flush and flow test the transmission oil cooler and lines. Refer to Transmission Fluid Cooler Flushing and Flow Test (J 45096) Transmission Fluid Cooler Flushing and Flow Test (J 45096).

Installation Procedure

1. Support the transmission with a transmission jack.

2. Raise the transmission into place.

3. Slide the transmission straight onto the locating pins while lining up the marks on the flywheel and the torque converter.

Caution: Refer to Fastener Caution Fastener Caution.

Note:

* The torque converter must be flush onto the flywheel and rotate freely by hand.

* Do not install the transmission fluid fill tube.




4. Install the bolts that secure the transmission to the engine. Tighten the studs and the bolts to 47 Nm (34 lb ft).




5. Install the bolts securing the torque converter to the engine flywheel.

1. First tighten all the bolts finger tight in order to insure proper converter seating.

2. Tighten the bolts to 60 Nm (44 lb ft).

6. If equipped with AWD, install the transfer case. Refer to Transfer Case Assembly Replacement .




7. Install the wiring harness connectors to the vehicle speed sensor and the park neutral position switch.

8. Position and install all vehicle harness wires, harness clips, tubes, brackets, and lines that were removed or moved prior to the transmission removal.

9. Install the transmission fluid fill tube and the fill tube seal. Refer to Transmission Fluid Filler Tube and Seal Replacement 4L60-E/4L65-E/4L70-E - Automatic Transmission.

10. Install the transmission vent hose and the wiring harness to the transmission.




11. Install the sight shield.

12. Install the starter motor. Refer to Starter Replacement (Diesel) Starter Replacement (Diesel)Starter Replacement (V8) Starter Replacement (V8)Starter Replacement (V6) Starter Replacement (V6).

13. Install the exhaust pipe to the exhaust manifolds and the muffler assembly to the exhaust pipe. Refer to Catalytic Converter Replacement (L20,LMF) Service and RepairCatalytic Converter Replacement (V6) Service and RepairCatalytic Converter Replacement (LGH) Service and RepairCatalytic Converter Replacement (LC8,L96) Service and Repair.

14. Install the transmission support crossmember. Refer to Transmission Support Crossmember Replacement Service and Repair.

15. Remove the transmission jack and the engine support stands.

16. Install the rear propeller shaft. Refer to One-Piece Propeller Shaft Replacement One-Piece Propeller Shaft Replacement or Two-Piece Propeller Shaft Replacement Two-Piece Propeller Shaft Replacement.




17. Install the transmission range select cable to the transmission range select lever and the bracket.

18. Install the transmission oil cooler pipes. Refer to Transmission Fluid Cooler Hose/Pipe Replacement Transmission Fluid Cooler Hose/Pipe Replacement.

19. Flush the transmission oil cooler and the pipes whenever you remove the transmission for overhaul, or replacement of the torque converter, the pump, or the transmission case. Refer to Transmission Fluid Cooler Flushing and Flow Test (J 45096) Transmission Fluid Cooler Flushing and Flow Test (J 45096).

20. Remove the safety stands.

21. Lower the vehicle.

22. Fill the transmission to the proper level using approved fluid.

23. Connect the battery negative cable assembly to the battery negative terminal and tighten bolt to 15 Nm (11 lb ft).

Note: It is recommended that transmission adaptive pressure (TAP) information be reset.

Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, the ECM, PCM or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.

24. Reset the TAP values. Refer to Transmission Adaptive Functions Transmission Adaptive Functions.