GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • DT 46495 (DW09925-98221) Gear, Bearing Installer
    • DT 46496 (DW09940-53111) Gear, Bearing Installer

    Object Number: 1223799  Size: SH
  1. Install the third gear/synchronizer ring (1).
  2. Important: Coat all of the inner parts the gear, the bearing, and the oil seal with gear fluid.

  3. Install the 3rd gear bearing (2).

  4. Object Number: 1223772  Size: SH
  5. Install the 3rd-4th synchronizer springs to the hub.
  6. Important: Position the synchronizer springs as shown.

  7. Install the third-fourth synchronizer key to the hub.
  8. Install the 3rd-4th hub (2) to the sleeve (1).

  9. Object Number: 1223783  Size: SH

    Important: Position the longer flange of hub toward the third gear and match the key and the ring groove.

  10. Insert the 3rd-4th hub assembly into the input shaft (2).
  11. Install the 3rd-4th hub assembly using a hammer and the DT 46496  (1).

  12. Object Number: 1223789  Size: SH

    Important: Do not overpress when installing the gear, bearing and hub assembly. If overpressed, the gear teeth may be damaged.

  13. When installing gear (1) , bearing and hub assembly, install them slowly using DT 46496 and a hammer. If overpressed, the gear teeth may be damaged.

  14. Object Number: 1223752  Size: SH
  15. Install the 3rd-4th synchronizer circlip.
  16. Important: Match the ring groove to the key of hub.

  17. Install the 4th synchronizer ring and wave spring.

  18. Object Number: 1223767  Size: SH
  19. Install the input shaft 4th gear bearing (2) and the 4th gear (1).

  20. Object Number: 1223780  Size: SH
  21. Install the 5th gear spacer (2) using DT 46495  (1) and a hammer.
  22. Install the 3rd-4th input shaft left side bearing using DT 46495 and a hammer.

  23. Object Number: 1223788  Size: SH
  24. Install the input shaft right side bearing to the input shaft using DT 46495 and a hammer (1).
  25. Install the gear unit. Refer to Transmission Disassemble .