GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1251739  Size: SH
  1. Install the mainshaft bearing

  2. Object Number: 1251737  Size: SH
  3. Install the ring, the thrust washer, and the 4th gear needle bearing.

  4. Object Number: 1251736  Size: SH
  5. Attach the synchronizer blocking ring to the 4th gear.

  6. Object Number: 1251733  Size: SH
  7. Install the 4th gear assembly.

  8. Object Number: 1251724  Size: SH
  9. Install the 3rd-4th gear synchronizer containing the synchronizer spring.

  10. Object Number: 1251720  Size: SH
  11. Install the snap ring and the washer around the mainshaft.

  12. Object Number: 1251718  Size: SH
  13. Install the synchronizer sleeve containing the keys and the spring.

  14. Object Number: 1251717  Size: SH
  15. Install the 3rd gear needle bearing.

  16. Object Number: 1251716  Size: SH
  17. Attach the synchronizer blocking ring to the 3rd gear.

  18. Object Number: 1251714  Size: SH
  19. Install the 3rd gear assembly.

  20. Object Number: 1251713  Size: SH
  21. Install the thrust washer and the ring.

  22. Object Number: 1251711  Size: SH
  23. Install the 2nd gear needle bearing.

  24. Object Number: 1251742  Size: SH
  25. Install the 2nd gear.

  26. Object Number: 1251709  Size: SH
  27. Install the 1st-2nd gear blocking ring.

  28. Object Number: 1251707  Size: SH
  29. Install the 1st-2nd synchronizer gear.

  30. Object Number: 1251705  Size: SH
  31. Install the washer and the snap ring.

  32. Object Number: 1251704  Size: SH
  33. Install the 1st gear needle bearing.

  34. Object Number: 1251703  Size: SH
  35. Install the keys onto the 1st-2nd synchronizer gear.

  36. Object Number: 1251702  Size: SH
  37. Install the synchronizer hub sleeve containing the synchronizer spring.

  38. Object Number: 1251701  Size: SH
  39. Install the outer blocking ring.
  40. Install the mainshaft wear plate, the flat-type 1st gear needle bearing, and the 1st gear.

  41. Object Number: 1251699  Size: SH
  42. Install the snap ring.

  43. Object Number: 1251743  Size: SH
  44. Press on the mainshaft bearing.