17. Transmission Rear Case Assemble

Transmission Rear Case Assemble

^ Tools Required
- J 8092 Driving Handle
- J 25070 Heat Gun
- J 44741 Shift Rail Bearing Installer
- J 44742 Countershaft Rear Bearing Installer





1. Using the J25070 heat the front case for 10 to 15 minutes.





Important: Install the bearing races with the rear case still hot. Do not allow the rear case to cool.

2. Install the shift rail bearing with the part number up, in the rear case using the J 8092 (1) and the J 44741 (2). The J 44741 (2) will install the bearing to the proper depth.





3. Install the countershaft rear bearing in the rear case using the J 8092 (1) and the J 44742 (2).





4. Lightly lubricate the reverse idler gear, bearings and shaft with GM P/N 12378515.
5. Install the reverse idler gear in the rear case. The oil grooves on the reverse gear align to the case or to the output end of the case.
6. Install the reverse gear idler bearings in the reverse gear.
7. Install the reverse gear idler shaft.
^ The bolt hole end is up.
^ Use the bracket bolt to align the shaft bolt hole with the bolt hole in the case.





8. Install the reverse gear idler shaft bracket.
^ The part numbers on the bracket align away from the case or up.
^ Align the bracket bolt hole with the case.
^ The bracket will drop in place if squarely set to the case.





Notice: Refer to Fastener Notice in Service Precautions.

9. Install the bolt with a new O-ring seal for the reverse gear idler shaft bracket.
^ Tighten the reverse idler gear bracket bolt to 23 Nm (17 ft. lbs.).





10. Apply pipe sealant GM P/N 12346004 to the threads of the back up lamp switch.
11. Install the back up lamp switch in the rear case.
^ Tighten the back up lamp switch to 20 Nm (15 ft. lbs.).





12. Install the Vehicle Speed Sensor (VSS) with 2 new O-ring seals in the rear case.
13. Install the VSS bolt and washer.
^ Tighten the VSS bolt to 20 Nm (15 ft. lbs.).





14. If the transmission is 4WD lightly lubricate the main shaft rear bearing O-ring seal with transmission lubricate, GM P/N 12378515
15. Install the main shaft rear bearing O-ring seal in the rear case.