Transmission Replacement 5.7L

Removal Procedure

Tools Required

J 21366 Converter Holding Strap

Perform a pressure test before removing the automatic transmission. This will help to aid in the diagnosis of the transmission.

1. Disconnect the intake air temperature (IAT) and mass airflow (MAF) sensors electrical connectors.
   
   
2. Remove the air intake duct.
   
   
3. Remove the transmission fluid level indicator.
4. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
5. Remove the oxidation catalytic converter, for the left side, refer to Oxidation Catalytic Converter Replacement in Engine Exhaust.
6. Remove the oxidation catalytic converter, for the right side, refer to Oxidation Catalytic Converter Replacement in Engine Exhaust.
   
   
7. Unsnap the range selector lever cable from the transmission.
8. Remove the propeller shaft. Refer to Propeller Shaft Replacement - One Piece in Propeller Shaft.
9. Support the rear axle with a suitable jack.
10. Remove the rear axle torque arm. Refer to Torque Arm Replacement in Rear Suspension.
11. Remove the transmission covers. Refer to Torque Converter Cover Replacement .
    
    
12. Remove the transmission torque converter bolts.
13. Remove the transmission oil cooler pipes. Refer to Oil Cooler Line Replacement .
    
    
14. Remove the wiring harness clamp bolt (1) attaching the clamp to the transmission.
15. Disconnect the transmission 20-way electrical connector (2). Depress both tabs on the connector and pull straight up; do not pry the connector.
16. Disconnect the vehicle speed sensor electrical connector (3).
17. Support the transmission using a transmission jack.
    
    
18. Remove the transmission mount nut.
    
    
19. Remove the support bolts and the support from the rail.
20. Lower the tail section of the transmission slightly.
    
    
21. Remove the transmission bolts.
22. Separate the transmission from the engine. Attach the J 21366 to the transmission.
23. Lower the transmission from the vehicle.
24. Remove the transmission fluid fill tube from the transmission, if necessary.

Installation Procedure

1. Install the transmission fluid fill tube, if removed.
2. Raise the transmission up to the vehicle.
3. Remove J 21366 from the transmission.
4. Align and install the transmission to the engine.
5. Install the transmission bolts. Tighten

Tighten the transmission bolts to 50 N·m (37 lb ft).

6. Install the transmission support and bolts to the rail. Tighten

Tighten the transmission support bolts to 90 N·m (66 lb ft).

7. Install the transmission mount nut. Tighten

Tighten the transmission mount nut to 105 N·m (77 lb ft).

8. Remove the transmission support.
   
   
9. Connect the vehicle speed sensor electrical connector (3).
10. Connect the 20-way electrical connector (2).
11. Install the wiring harness clamp bolt (1) attaching the clamp to the transmission. Tighten

Tighten the wiring harness clamp bolt (1) to 2.5 N·m (22 lb in).

12. Install the transmission oil cooler lines. Refer to Oil Cooler Line Replacement .
    
    
13. Install the transmission torque converter bolts. Tighten

Tighten the transmission torque converter bolts to 60 N·m (44 lb ft).

14. Install the transmission covers. Refer to Torque Converter Cover Replacement .
15. Install the rear axle torque arm. Refer to Torque Arm Replacement in Rear Suspension.
16. Remove the rear axle support.
17. Install the propeller shaft. Refer to Propeller Shaft Replacement - One Piece in Propeller Shaft.
    
    
18. Connect the range selector lever cable to the transmission.
19. Install the oxidation catalytic converter, for the right side, refer to Oxidation Catalytic Converter Replacement in Engine Exhaust.
20. Install the oxidation catalytic converter, for the left side, refer to Oxidation Catalytic Converter Replacement in Engine Exhaust.
21. Lower the vehicle.
    
    
22. Install the transmission fluid level indicator.
    
    
23. Install the air intake duct.
    
    
24. Connect the intake air temperature (IAT) and mass airflow (MAF) sensors electrical connectors.
25. Adjust the automatic transmission shift control lever cable. Refer to Shift Cable Replacement

Notice

Whenever you remove the transmission for service, you must perform the automatic transmission oil cooler flushing procedure in order to remove the existing fluid which may be contaminated. This will prevent contamination of the new fluid. You must perform the flushing procedure after the installation of the overhauled or replacement transmission.

26. Flush the transmission oil cooler, oil cooler pipes, and the hoses. Refer to Automatic Transmission Oil Cooler Flushing .
27. Check the transmission fluid level. Refer to Transmission Fluid Checking Procedure .