Transmission Replacement

Transmission Replacement (AWD)

Removal Procedure

1. Remove the battery tray. Refer to Battery Tray Replacement (Battery Tray Replacement).
2. Remove the transmission range select lever cable and bracket.
3. Drain the transmission fluid. Refer to Transmission Fluid Replacement ().




4. Remove the wire harness retainer (2) from the control valve body cover stud.
5. Disconnect the control valve body transmission control module (TCM) electrical connector (1).




6. Remove the transmission fluid cooler pipe retainer nut (1).
7. Remove the transmission fluid cooler inlet hose and seal (2) from the transmission.
8. Plug and/or cap the hose and transmission to prevent contamination.




9. Remove the transmission fluid cooler pipe retainer nut (1).
10. Remove the transmission fluid cooler outlet hose and seal (2) from the transmission.
11. Plug and/or cap the hose and transmission to prevent contamination.
12. Disconnect both pipes from the retainer.
13. Install the engine support fixture. Refer to Engine Support Fixture (Engine Support Fixture).
14. Remove the right catalytic converter and pipe assembly. Refer to Catalytic Converter Replacement - Right Side (LF1) ().
15. Use a transmission jack in order to support the transmission.
16. Remove the rear transmission mount from the transmission. Refer to Transmission Rear Mount Replacement (Transmission Rear Mount Replacement).
17. Remove the front transmission mount from the transmission. Refer to Transmission Front Mount Replacement (Transmission Front Mount Replacement).
18. Remove the left transmission mount from the transmission. Refer to Transmission Mount Replacement - Left Side (Transmission Mount Replacement - Left Side).




19. Remove the upper transmission to engine bolts (1, 2).
20. Remove the frame. Refer to Drivetrain and Front Suspension Frame Replacement (Drivetrain and Front Suspension Frame Replacement).
21. Disconnect the wheel drive shafts from the transmission and transfer case. Refer to Front Wheel Drive Shaft Replacement (Service and Repair).
22. Remove the transfer case from the transmission. Refer to Transfer Case Assembly Replacement (Transfer Case Assembly Replacement).




23. Remove the starter. Refer to Starter Replacement (LAF) (Service and Repair)Starter Replacement (LF1) (Service and Repair).
24. Mark the relationship of the flywheel to the torque converter for reassembly.
25. Remove the torque converter to flywheel bolts.




26. Remove the flywheel inspection cover bolts (2, 3).
27. Remove the flywheel inspection cover (1).
28. Remove the remaining transmission bolts (4).

Note: Insure the torque converter remains securely in place on the transmission input shaft while separating and removing the transmission.

29. Separate the transmission from the engine.
30. Lower the transmission with the transmission jack far enough to remove the transmission.

Installation Procedure

1. Raise the transmission with the transmission jack and position the transmission to the engine.





Caution: Refer to Fastener Caution (Fastener Caution).

2. Install the transmission bolts (4) and tighten to 75 Nm (55 lb ft).
3. Install the flywheel inspection cover (1).
4. Install the flywheel inspection cover bolts (2, 3) and tighten to 75 Nm (55 lb ft).
5. Install the transfer case to the transmission. Refer to Transfer Case Assembly Replacement (Transfer Case Assembly Replacement).
6. Remove the transmission jack.





Note: If reusing the torque converter bolts, clean the threads and apply LOCTITE(TM)242, GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads prior to installation.

7. Install the torque converter to flywheel bolts and tighten to 62 Nm (46 lb ft).
8. Install the starter. Refer to Starter Replacement (LAF) (Service and Repair)Starter Replacement (LF1) (Service and Repair).
9. Install the front transmission mount to the transmission. Refer to Transmission Front Mount Replacement (Transmission Front Mount Replacement).
10. Install the rear transmission mount to the transmission. Refer to Transmission Rear Mount Replacement (Transmission Rear Mount Replacement).
11. Install the left transmission mount to the transmission. Refer to Transmission Mount Replacement - Left Side (Transmission Mount Replacement - Left Side).
12. Install the wheel drive shafts to the transmission. Refer to Front Wheel Drive Shaft Replacement (Service and Repair).
13. Install the frame. Refer to Drivetrain and Front Suspension Frame Replacement (Drivetrain and Front Suspension Frame Replacement).




14. Install the upper transmission to engine bolt (1, 2) and tighten to 75 Nm (55 lb ft).
15. Install the right catalytic converter and pipe assembly. Refer to Catalytic Converter Replacement - Right Side (LF1) ().
16. Remove the engine support fixture.
17. Lower the vehicle.




18. Install the transmission fluid cooler outlet hose and seal (2) to the transmission.
19. Install the transmission fluid cooler pipe retainer nut (1) and tighten to 22 Nm (16 lb ft).




20. Install the transmission fluid cooler inlet hose and seal (2) to the transmission.
21. Install the transmission fluid cooler pipe retainer nut (1) and tighten to 22 Nm (16 lb ft).




22. Connect the control valve body TCM electrical connector (1).
23. Install the wire harness retainer (2) to the control valve body cover stud and tighten the nut to 12 Nm (106 lb in).
24. Install the transmission range select lever cable and bracket.
25. Install the battery tray. Refer to Battery Tray Replacement (Battery Tray Replacement).
26. Adjust the automatic transmission range selector lever cable. Refer to Range Selector Lever Cable Adjustment (Adjustments).
27. Fill the transmission with fluid. Refer to Transmission Fluid Replacement ().
28. For transmission control module programming and setup, refer to Transmission Control Module Programming and Setup (6T30/6T40/6T45/6T50) (Transmission Control Module Programming and Setup)Transmission Control Module Programming and Setup (6T70) (Transmission Control Module Programming and Setup).

Note: After an internal transmission repair or internal part replacement the service fast learn adapt procedure should be performed.

29. Perform the transmission adaptive values learn procedure. Refer to Transmission Adaptive Values Learn (Transmission Adaptive Values Learn).
30. Road test the vehicle.