GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 38734 Intermediate Spring Compressor Adapter
    • J 45133 Seal Protector
    • J 45139 Compressor Plate

    Object Number: 801898  Size: SH
  1. Inspect the reverse clutch housing for the following:
  2. • Plugged feed passages
    • Damaged or worn splines
    • Seal ring groove nicks or burrs
    • Cracked or blocked fluid passages
    • Damaged or worn bushing
  3. Inspect the reverse clutch piston and the direct clutch piston for the following:
  4. • Cracks or damage to seal grooves
    • Wear on the piston
    • Inner seal damage
    • Damaged ball check valve
    • Damaged or worn clutch plates
  5. Install the reverse clutch piston inner seal (402).
  6. Install the reverse clutch piston (404).

  7. Object Number: 801899  Size: SH
  8. Install J 45133 onto the direct and reverse clutch assembly (6).
  9. Install the direct clutch piston (406).

  10. Object Number: 801894  Size: SH
  11. Install the piston spring (407).
  12. Install the piston spring retainer (408).

  13. Object Number: 801893  Size: SH
  14. Use J 38734  (1) and J 45139  (2) to compress the direct and reverse piston spring.
  15. Install the direct and reverse clutch spring snap ring (409).

  16. Object Number: 801892  Size: SH
  17. Install the apply plate (410).
  18. Install the clutch plates (412, 411), starting with the direct clutch plate (411) with outer splines, alternating with the direct clutch plate (412) with inner splines. Refer to Clutch Plate Selection Specifications.
  19. Install the backing plate (413).
  20. Install the backing plate snap ring (414).

  21. Object Number: 816733  Size: SH
  22. Measure the distance between the direct clutch backing plate and the bottom of the gage bar. Measure three times in different locations on the backing plate. Record this as H1.
  23. Apply 65 PSI (448.17 kPa) of air pressure to the specified port. Measure the distance between the direct clutch backing plate and the bottom of the gage bar. Measure three times in different locations on the backing plate. Record this as H2.
  24. Subtract H2 from H1. This is the clutch pack travel. Refer to Clutch Piston Travel Specifications.

  25. Object Number: 801890  Size: SH
  26. Install the reverse clutch spacer (415).
  27. Install the apply plate (416).
  28. Install the clutch plates (417 and 418), starting with clutch plates (417) with outer splines, alternating with clutch plates (418) with inner splines. Refer to Clutch Plate Selection Specifications.
  29. Install the reverse clutch backing plate (419).
  30. Install the reverse clutch backing plate snap ring (420).

  31. Object Number: 816735  Size: SH
  32. Measure the distance between the reverse clutch backing plate and the bottom of the gage bar. Measure three times in different locations on the backing plate. Record this as H1.
  33. Apply 65 PSI (448.17 kPa) of air pressure to the specified port. Measure the distance between the reverse clutch backing plate and the bottom of the gage bar. Measure three times in different locations on the backing plate. Record this as H2.
  34. Subtract H2 from H1 this is the clutch pack travel. Refer to Clutch Piston Travel Specifications.