GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • DT 46496 (DW09940-53111) Gear, Bearing Installer
    • DT 46493 (DW09913-80112) Gear, Bearing Installer
    • DT 46495 (DW09925-98221) Gear, Bearing Installer
    • KM-466-A Gear, Bearing Remover/Installer

    Object Number: 1224128  Size: SH

    Important:  Coat the inner parts: gear, bearing and oil seal etc. with gear fluid.

  1. Install the 1st gear bearing (2).
  2. Install the 1st gear (3).
  3. Important:  Be careful there is the difference of key groove width between the 1st synchronizer ring and the 2nd synchronizer ring.

  4. Install the 1st gear synchronizer ring (1)

  5. Object Number: 1224125  Size: SH
  6. Note the differences between the 1st synchronizer ring (A) and the 2nd synchronizer ring (B).
  7. Specifications

        • The key groove widths for the 1st synchronizer ring-A (1) is 8.2 mm (0.323 in).
        • The key groove widths for the 2nd synchronizer ring-B (2) is 9.6 mm (0.378 in)

    Object Number: 1224082  Size: SH
  8. Install the 1st-2nd synchronizer springs to hub.
  9. Important:  Let (A)=(B), when installing the keys.

  10. Install the 1st-2nd synchronizer keys to hub.
  11. Install the hub (2) to the sleeve (1).

  12. Object Number: 1223808  Size: SH

    Important:  Position the synchronizer key to the 1st gear synchronizer ring groove.

  13. Insert the 1st-2nd synchronizer hub assembly into the counter shaft using the DT 46496  (1), the KM-466-A  (2), and a hammer.

  14. Object Number: 1223817  Size: SH

    Important:  Position the 2nd synchronizer ring groove to the synchronizer hub key.

  15. Install the 2nd synchronizer ring.
  16. Install the 1st-2nd gear synchronizer circlip.

  17. Object Number: 1224123  Size: SH
  18. Install the 2nd gear bearing (2).
  19. Install the 2nd gear (1).

  20. Object Number: 1223818  Size: SH
  21. Insert the 3rd gear and the 3rd-4th gear spacer into the counter shaft.
  22. Install the 3rd-4th gear spacer (2) using DT 46493 and a hammer.
  23. Install the 3rd gear spacer (3) using DT 46493 and a hammer.

  24. Object Number: 1223804  Size: SH
  25. Install the 4th gear (2) to the counter shaft using DT 46495 and a hammer (1).

  26. Object Number: 1224143  Size: SH
  27. Install the left side bearing (2) to the counter shaft using DT 46493  (1) and a hammer.

  28. Object Number: 1223796  Size: SH
  29. Install the counter shaft right side bearing.
  30. Install the gear unit. Refer to Transmission Replacement .