GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 28537-17 Bearing Race Installer
    • J 36183 Press Tube
    • J 36184 Press Tube Adapter
    • J 39371 1st/2nd Synchronizer Installer
    • J 39441 5th/6th Driven Gear Installer
    • J 39441-10 Installer Adapter
    • J 39441-20 5th Gear Installer Adapter
    • J 39473 Mainshaft Bearing Installers .
    • J 44735 Installation Tube

For equivalent regional tools, refer to Special Tools

Mainshaft


    Object Number: 2102234  Size: SH
  1. Install the 3rd speed gear caged needle bearing and the spacer.
  2. Install the 3rd speed drive gear spacer.

  3. Object Number: 4810  Size: SH
  4. Check the 3rd/4th speed gear synchronizer assembly scribe marks for correct positions.

  5. Object Number: 2102291  Size: SH
  6. Install the 3rd/4th synchronizer assembly as follows:
  7. 4.1. Start the press operation.
    4.2. STOP pressing before the keys engage the blocking ring slots.
    4.3. Lift and rotate the 3rd speed gear in order to engage the keys with the blocking ring.
    4.4. Continue pressing until the synchronizer is seated.
  8. Install the following parts in order:
  9. 5.1. The 3rd speed gear (3)
    5.2. The spacer (4)
    5.3. The thrust washer (5)
    5.4. The 3rd speed gear inner cone (6)
    5.5. The 3rd speed gear friction cone (7)
    5.6. The 3rd speed gear blocking ring (8)
    5.7. The 3rd/4th speed gear synchronizer assembly (9). The groove on the sleeve faces the 3rd speed gear.

    Object Number: 2102232  Size: SH
  10. Install the 3rd/4th synchronizer retainer ring (1).

  11. Object Number: 2102293  Size: SH
  12. Install a new mainshaft small tapered bearing (2), using the J 39473 installers  (1), V-blocks, and a hydraulic press.

  13. Object Number: 2102230  Size: SH
  14. Install the 2nd speed gear caged needle bearing (2) and bearing spacer (1).

  15. Object Number: 98287  Size: SH
  16. Do the following when installing the 1st/2nd synchronizer assembly:
  17. 9.1. Start the press operation.
    9.2. Stop pressing before the keys engage the blocking ring slots.
    9.3. Lift and rotate the 2nd speed gear in order to engage the keys with the blocking ring.
    9.4. Continue pressing until the synchronizer is seated.
  18. Install the following parts in order using the J 39371 1st/2nd installer and a hydraulic press:
  19. 10.1. The 2nd speed gear
    10.2. The 2nd speed gear inner cone
    10.3. The 2nd speed gear friction cone
    10.4. The 2nd speed gear blocking ring
    10.5. The 1st/2nd synchronizer assembly (The ID groove on the sleeve faces the 1st speed gear.)

    Object Number: 2102227  Size: SH
  20. Install the following parts in order:
  21. 11.1. The 1st speed gear two piece washer (5)
    11.2. The 1st speed gear locking ring (4)
    11.3. The 1st speed gear synchronizer blocking ring (3)
    11.4. The 1st speed gear outer cone (2)
    11.5. The 1st speed gear inner cone (1)

    Object Number: 2102295  Size: SH
  22. Install the following parts in order:
  23. 12.1. The 1st speed gear caged needle bearing (1)
    12.2. The 1st speed gear (2)
    12.3. The mainshaft inner seal O-ring (3)

    Object Number: 2187579  Size: SH
  24. Using J 39441 installer  (1), J 39441-20 adapter  (2), and a press, install the mainshaft large tapered bearing (3).

  25. Object Number: 2102299  Size: SH
  26. Using the J 39441 gear installer  (1) and the J 39441-10 adapter  (2), install the 6th speed driven gear (3).

Input Shaft


    Object Number: 1887615  Size: SH
  1. Install a new bearing race on the input shaft, using the J 28537-17 installer and a hydraulic press.

  2. Object Number: 1887616  Size: SH
  3. Install a new tapered bearing on the input shaft. Use the J 44735 tube and a hydraulic press.