GM Service Manual Online
For 1990-2009 cars only

Countershaft Extension Disassemble T56 Base Model

Tools Required

    • J 22912-B Rear Pinion and Axle Bearing Remover
    • J 39442 Press Adapter
    • J 39443 Split Plate

    Object Number: 38621  Size: SH
  1. Remove the 5th/6th speed shift fork.

  2. Object Number: 588087  Size: SH
  3. Remove the following parts in order:
  4. 2.1. The 6th speed drive gear
    2.2. The 6th speed gear bearing spacer
    2.3. The caged needle bearing
    2.4. The 6th speed gear bearing spacer

    Object Number: 105678  Size: SH
  5. Remove the following parts in order:
  6. 3.1. The 5th/6th speed synchronizer retainer ring
    3.2. The thrust washer
    3.3. The 6th speed drive gear inner cone
    3.4. The 6th speed drive gear friction cone
    3.5. The 6th speed drive gear blocking ring
  7. Discard the retainer ring.

  8. Object Number: 602486  Size: SH
  9. Remove the 5th speed drive gear, using the J 22912-B and a hydraulic press.
  10. The 5th/6th speed synchronizer assembly, and the 5th speed drive gear blocking ring, friction cone, inner cone and thrust washer will press off with the 5th speed drive gear.

  11. Remove the 5th speed drive gear caged needle bearing.
  12. Important: Do not replace the small tapered bearing unless inspection shows bearing damage.


    Object Number: 38334  Size: SH
  13. Remove the small tapered bearing, using the J 39442 , the J 39443 , and a hydraulic press.