GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 23907 Slide Hammer
    • J 26941 Bushing and Bearing Remover - 3-4 in
    • J 36017 Valve Seal Remover
    • J 36190 Universal Driver Handle
    • J 39439-2 Bushing Remover
    • J 39439-3 Shift Rail Remover
    • J 39442 Mainshaft and Countershaft Press Adapter

Transmission Case


    Object Number: 1938406  Size: SH
  1. Remove the transmission case cooler line return fitting.

  2. Object Number: 1938407  Size: SH
  3. Remove the reverse lamp switch.

  4. Object Number: 1938408  Size: SH
  5. Remove the E-Z key switch (1).

  6. Object Number: 1938409  Size: SH
  7. Remove the dowel pins.

  8. Object Number: 1938410  Size: SH

    Important: Do not replace the bearing race unless inspection shows bearing race damage.

  9. Remove the countershaft bearing race, using J 39442  (1) and J 26941  (2). Tap out race with a hammer.

  10. Object Number: 1938411  Size: SH

    Important: Do not replace the bearing race unless inspection shows bearing race damage.

  11. Remove the mainshaft bearing race, using J 39442  (1) and J 26941  (2). Tap out race with a hammer.

  12. Object Number: 1938414  Size: SH
  13. Remove the 1st/2nd and the 3rd/4th shift shaft bushings, using the J 39439-3  (2) and the J 36190  (1).

Adapter Plate


    Object Number: 1938417  Size: SH
  1. Attach J 36017 over oil filter. Ensure that the tool grasps the oil filter where it contacts the adapter plate.
  2. Slide the collar of J 36017 down to secure the oil filter.

  3. Object Number: 1938420  Size: SH
  4. Using J 23907  (1) and J 36017  (2), remove the oil filter.

  5. Object Number: 1887596  Size: SH
  6. Remove the input shaft bearing race and the shim.

  7. Object Number: 1887598  Size: SH
  8. Remove the countershaft bearing race and the shim.

  9. Object Number: 1887600  Size: SH
  10. Remove the input shaft seal.

  11. Object Number: 1887601  Size: SH
  12. Remove the 1st/2nd and the 3rd/4th shift shaft bushing, using the J 39439-3  (2) with the J 36190  (1).

  13. Object Number: 1887604  Size: SH
  14. Remove the dowel pins.

  15. Object Number: 1938423  Size: SH
  16. Remove the retainer ring (1).
  17. Remove the oil pump cover assembly (2).
  18. Remove the oil pump (3).

  19. Object Number: 1938426  Size: SH
  20. Remove the plug (1).
  21. Remove the spring (2).
  22. Remove the check ball (3).

  23. Object Number: 1887603  Size: SH

    Important: Do not replace the bushing unless inspection shows bushing damage.

  24. Remove the 1st/2nd and the 3rd/4th shift shaft seals (1) and (2), and the bushing (3).

  25. Object Number: 1998735  Size: SH
  26. Remove the pump outlet cooler fitting (1) and seal (2).
  27. Remove the adapter plate pump plug (3).