Tools Required

1. Install the lst/2nd and the 3rd/4th shift shaft bushings. Use the J 36190 , the J 39439-4 , and the J 39439-3 .



2. Install the mainshaft bearing race, using the J 8092 and the J 39435 .



3. Install the countershaft bearing race, using the J 8092 and the J 39435 .



4. Install the dowel pins.



5. Apply sealant GM P/N 12346004 or equivalent to the threads of the reverse lamp switch.




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

6. Install the backup lamp switch.

Tighten
Tighten the switch to 27 N·m (20 lb ft).




7. Apply sealant GM P/N 12346004 or equivalent, to the threads of the transmission case fill plug.



8. Install the transmission case fill plug.

Tighten
Tighten the transmission case fill plug to 18 N·m (13 lb ft).





Notice: The H-pattern on the guide plate must face the extension housing. If the guide plate is installed incorrectly, then damage will occur.

9. Install the guide plate and the guide plate bolts.

Tighten
Tighten the bolts to 22 N·m (16 Ib ft).

Tools Required

1. Install the dowel pins.




Notice: If the 1st/2nd, 3rd/4th speed shift shaft bushing is installed incorrectly it will interfere with the inner shift rail seal causing a leak.

2. Install the 1st/2nd, 3rd/4th speed shift shaft bushing flush with adapter plate, using the J 39439-1 .



3. Install the inner shift rail seal (1) using the J 42496 . Garter spring should face inside of transmission.
4. Install the outer shift rail seal (2) using the J 42464 .



5. Install the input shaft seal, using the J 39433 .



6. Install the countershaft bearing shim and bearing race. Refer to Input Shaft, Mainshaft and Countershaft in Shimming Procedures .



7. Install the input shaft bearing shim and bearing race. Refer to Input Shaft, Mainshaft and Countershaft in Shimming Procedures .



8. Install the neutral return cam spring.
9. Install the neutral return cam spring retaining bolt and washer.
10. Install the neutral return cam.

Tighten
Tighten the bolt to 25 N·m (18 lb ft).