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Home >> Chevy Truck >> 2008 >> Uplander V6-3.9L >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Service and Repair >> Removal and Replacement >> Transmission Replacement

Transmission Replacement



Transmission Replacement (M15)

Tools Required
* J 35944-A Transmission Oil Cooler and Line Flusher
* J 37096 Flywheel Holder

Removal Procedure




1. Remove the push pins from the coolant recovery bottle.
2. Position aside coolant recovery bottle.
3. Remove air cleaner assembly. Refer to Air Cleaner Assembly Replacement (Service and Repair).




4. Remove the automatic transmission range selector cable (1) from the manual shaft (5).
5. Remove the automatic transmission range selector cable bracket (4). Refer to Range Selector Lever Cable Bracket Replacement (Range Selector Lever Cable Bracket Replacement).




6. Disconnect the wiring harness connector (3) from the transaxle.
7. Remove the wiring harness retainer from the side cover.




8. Remove the top 4 bell housing bolts (1, 2, 3) and stud (4).
9. Install the engine support fixture. Refer to Engine Support Fixture (Engine Support Fixture).
10. Remove the frame. Refer to Front Frame Replacement (Front Frame Replacement).




11. Remove the torque converter inspection cover. Refer to Torque Converter Cover Replacement (Service and Repair).




12. UseJ 37096 in order to gain access to the torque converter bolts and prevent the flywheel from turning.




13. Remove the torque converter bolts.
14. Disconnect the vehicle speed sensor.
15. Remove the right and left axle shafts from the transmission. Refer to Front Wheel Drive Shaft Replacement (Service and Repair).
16. Disconnect the transmission cooler lines. Refer to Automatic Transmission Oil Cooler Hose Replacement (Service and Repair).
17. Position the transmission jack under the transaxle.
18. Remove the transaxle brace. Refer to Transmission Brace Replacement (Front Wheel Drive) (Transmission Brace Replacement (Front Wheel Drive)).




19. Remove the lower transaxle bolt (6) and stud (5).
20. Remove the transaxle from the vehicle.

Important: UseJ 35944-A or equivalent to flush the following components whenever the transaxle is removed for overhaul or whenever the torque converter pump or the case is replaced:


21. Flush the transaxle oil cooler pipes and the transaxle oil cooler.
22. Transfer all necessary parts as needed.

Installation Procedure

1. Align the transaxle filler tube to the transmission and install the transaxle into the vehicle.





Notice: Refer to Fastener Notice (Fastener Notice).

2. Install the lower transaxle bolt (6) and stud (5).

Tighten the bolt and stud to 75 N.m (55 lb ft).

3. Install the transaxle brace. Refer to Transmission Brace Replacement (Front Wheel Drive) (Transmission Brace Replacement (Front Wheel Drive)).
4. Install the transaxle brace. Refer to Transmission Brace Replacement (Front Wheel Drive) (Transmission Brace Replacement (Front Wheel Drive)).
5. Connect the transmission cooler lines. Refer to Automatic Transmission Oil Cooler Hose Replacement (Service and Repair).
6. Install the right and left axle shafts into the transaxle. Refer to Front Wheel Drive Shaft Replacement (Service and Repair).
7. Connect the vehicle speed sensor.




8. Install the torque converter bolts.

Tighten the bolts to 63 N.m (46 lb ft).




9. Install the torque converter inspection cover. Refer to Torque Converter Cover Replacement (Service and Repair).
10. Install the frame. Refer to Front Frame Replacement (Front Frame Replacement).
11. Install the front wheels. Refer to Tire and Wheel Removal and Installation (Service and Repair).
12. Lower vehicle.
13. Remove the engine support fixture. Refer to Engine Support Fixture (Engine Support Fixture).




14. Install the upper transaxle bolts (1, 2, 3) and stud (4).

Tighten the bolts and stud to 75 N.m (55 lb ft).




15. Connect the wiring harness (3) to the transaxle.




16. Install the transmission range selector cable bracket (4). Refer to Range Selector Lever Cable Bracket Replacement (Range Selector Lever Cable Bracket Replacement).
17. Install the automatic transmission range selector cable (1) on the manual shaft (5).
18. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement (Service and Repair).




19. Install the coolant recovery bottle.

Notice: Do NOT overfill the transaxle. The overfilling of the transaxle causes foaming, loss of fluid, shift complaints, and possible damage to the transaxle.

20. Adjust the fluid level. Refer to Transmission General Specifications (Transmission General Specifications) andFluid Capacity Specifications (Capacity Specifications).

Important: It is recommended the ate 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.


21. Reset the TAP values. Refer to Transmission Adaptive Functions (Transmission Adaptive Functions).
22. Inspect for fluid leaks.

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