GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 33374 Collar Installer

    Important: Lubricate the thrust surfaces of all gears and washers prior to installation.

  1. Assemble the following items for the 3rd gear:
  2. • The needle bearings
    • The 3rd gear
    • The blocker ring.

    Object Number: 12529  Size: SH
  3. Align the inserts of the 3rd/4th synchronizer assembly with the grooves in the blocker ring:
  4. Important: Lubricate the spline and hub interiors prior to installation.

  5. Install the 3rd/4th synchronizer assembly using the J 33374 .
  6. The groove on the 3rd/4th synchronizer assembly faces the input side.

  7. Install the collar using the J 33374 .
  8. Lubricate the circumference of the collar.
  9. Verify that the insert springs do not interfere with the hub.
  10. Assemble the following items for the 4th gear:
  11. • The needle bearing
    • The blocker ring
    • The 4th gear
  12. Assemble the thrust washer so that the recessed area faces the fourth gear.
  13. Important: Lubricate the bearing interior and race surfaces prior to installation.

    Important: The retainer ring on the rear bearing must face the rear of the input shaft.


    Object Number: 12490  Size: SH
  14. Assemble the rear bearing using the J 33374 .

  15. Object Number: 107599  Size: SH
  16. Install the collar (1) and the stopper plate (2) using the J 33374 and a press.