H. Transmission Case

^ Tools Required:
- J 8092 Drive Handle
- J 36190 Drive Handle
- J 39435 Mainshaft and Countershaft Bearing Race Installer
- J 23907 Slide Hammer
- J 39439-4 Bushing Installer
- J 39439-3 Bushing Installer
- J 39439-2 Bushing Remover
- J 39790 Mainshaft Bearing Race Remover
- J 39791 Countershaft Bearing Race Remover

DISASSEMBLE
1. Transmission fill plug (60).
2. Back up lamp switch (59).
3. Dowel pins (58).

Important
- Do not replace bearing races (107 and 43) unless inspection shows bearing race damage.

4. Countershaft bearing race (107) using J 8092 and J 39791.
5. Mainshaft bearing race (43) using J 8092 and J 39790.
6. 1st/2nd, 3rd/4th shift rail bushings (49) using J 23907 and J 39439-2.

Clean
- Transmission case components with solvent and dry with compressed air.

Inspect
Transmission case components.
- Bearing races (43 and 107) and bores for wear, scratches or grooves.
- Bushing (49) for excessive wear. Replace if these conditions exist.
- Case (44) for cracks, threaded openings for damaged threads, sealing surfaces for nicks, burrs or scratches. If case is cracked, it must be replaced.

NOTICE: If scuffed, nicked, burred or scoring conditions cannot be reconditioned by hand with a soft stone or crocus cloth, replace the component.

ASSEMBLE
1. 1st/2nd, 3rd/4th shift rail bushings (49) using J 36190, J 39439, and J 39439-3
2. Mainshaft bearing race (43) using J 8092 and J39435.
3. Countershaft bearing race (107) using J 8092 and J 39435.
4. Dowel pins (58).
5. Backup lamp switch (59).

Tighten
- Switch (59) to 27 N.m (20 lb. ft.).

6. Transmission fill plug (60) with sealant GM P/N 12346004.

Tighten
- Transmission fill plug (60) to 18 N.m (13 lb. ft.).

7. Guide plate (55) and guide plate bolts (54).

Tighten
- Bolts (54) to 22 N.m (16 lb. ft.).