GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • DT 48074 Input and Output Shaft Seal Installer
    • DT 48802 Bearing Installer
    • J 8092 Drive Handle
    • J 21426 Outer Output Shaft Seal Installer
    • J 36190 Universal Driver Handle
    • J 39437 Bushing Installer
    • J 39439-3 Rear Case Bushing Installer
    • J 39546 Bearing Race Installer
    • J 44384 Shifter Fork Bearing Installer

For equivalent regional tools, refer to Special Tools.


    Object Number: 1938448  Size: SH
  1. Using J 36190 handle  (1) and J 39439-3 installer  (2), install the reverse rail bushing.

  2. Object Number: 2102286  Size: SH
  3. Install the shift rail bearing using the J 36190 handle  (1) and the J 44384 installer  (2).

  4. Object Number: 2102288  Size: SH
  5. Install the seal using the J 36190 handle  (1) and J 44384 installer  (2).

  6. Object Number: 1938449  Size: SH
  7. Snap the oil funnel into a NEW extension housing countershaft bearing assembly.
  8. Using the J 36190 handle  (1) and DT 48802 installer  (2), install the countershaft bearing.

  9. Object Number: 1998736  Size: SH
  10. Install the countershaft rear bearing retainer.

  11. Object Number: 1887611  Size: SH
  12. Install the mainshaft bearing race, using the J 39546 installer  (1) and the J 8092 drive handle  (2).

  13. Object Number: 1887612  Size: SH
  14. Install the mainshaft bearing race retainer ring.

  15. Object Number: 2102277  Size: SH
  16. Install the NEW output shaft seal using the J 8092 drive handle and the DT 48074 input/output Shaft installer .

  17. Object Number: 38436  Size: SH
  18. Apply sealer GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the transmission case drain plug.
  19. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 2102281  Size: SH
  20. Install the transmission case drain plug (2) and tighten to 27 N·m (20 Ib ft).
  21. Install the vehicle speed sensor (1).
  22. Install the vehicle speed sensor bolt and tighten to 11 N·m (96 Ib in).

  23. Object Number: 2102279  Size: SH
  24. Install a NEW O-ring onto the reverse lockout assembly.
  25. Install the reverse lockout assembly into the extension housing.
  26. Install the reverse lockout assembly bolt and tighten to 18 N·m (13 Ib ft).

  27. Object Number: 2102278  Size: SH
  28. Install the roller bearing (2).
  29. Install the snap ring (1).

  30. Object Number: 2102276  Size: SH
  31. Install the reverse idler gear shaft (1).

  32. Object Number: 1938443  Size: SH
  33. Install the roller bearing and reverse idler gear.

  34. Object Number: 38712  Size: SH
  35. Apply GM P/N 12345382, (Canadian P/N 10953489) or equivalent to the reverse idler shaft bracket bolt threads.

  36. Object Number: 1938442  Size: SH
  37. Install the reverse idler shaft bracket and bolts. Tighten the bolts to 25 N·m (18 lb ft).