GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 23327 Clutch Spring Compressor
    • J 45127 Center Support Removal Tool
    • J 45136 Seal Protector
    • J 45140 Seal Protector
    • J 45145 Piston Protector
    • J 45688 Piston Installer - Pusher
    • J 46239-1 Second Coast Clutch Outer Protector
    • J 46239-2 Second Coast Clutch Inner Protector
    • J 46239-3 Second Coast Clutch Pusher
    • J 46240-1 Seal Protector
    • J 46240-2 Seal Protector

For equivalent regional tools, refer to Special Tools.


    Object Number: 952081  Size: SH
  1. Inspect the center support components for the following:
  2. • Plugged fluid passages
    • Worn or damaged splines
    • Worn or damaged pistons
    • Worn or damaged clutch plates
  3. Install J 46240-1 seal protector  (2), and J 45145 piston protector  (3) into the housing.

  4. Object Number: 952070  Size: SH
  5. Install the 2nd clutch piston (520).
  6. Install the 2nd clutch piston spring (521) into the center support (518).
  7. Use J 23327 spring compressor to compress the 2nd clutch piston spring (521).
  8. Install the 2nd clutch spring retainer ring (522) into the center support (518).
  9. Remove J 23327 spring compressor from the center support (518).

  10. Object Number: 952065  Size: SH
  11. Install the 2nd clutch apply plate (523) into the center support (518).
  12. Install the 2nd clutch plates. Start by installing the 2nd clutch plate (524) with external splines. Alternate with the 2nd clutch plate (525) with internal splines. Refer to Clutch Plate Selection Specifications.
  13. Install the 2nd clutch backing plate (526) into the center support (518).
  14. Install the 2nd clutch backing plate retainer ring (527) into the center support (518).

  15. Object Number: 952153  Size: SH
  16. Measure the distance between the 2nd clutch backing plate and the bottom of the gage bar. Measure three times in different locations on the backing plate. Record this as H1.
  17. Apply 65 PSI (448.17 kPa) of air pressure to the specified port. Measure the distance between the 2nd clutch backing plate and the bottom of the gage bar. Measure three times in different locations on the backing plate. Record this as H2.
  18. Subtract H2 from H1 this is the 2nd clutch pack travel. Refer to Clutch Piston Travel Specifications.

  19. Object Number: 952086  Size: SH
  20. Using J 46239-1 outer protector  (3), J 46239-2 inner protector  (2) and J 46239-3 pusher  (1), install the 2nd coast clutch piston (528).

  21. Object Number: 952056  Size: SH
  22. Install the 2nd coast clutch spring (529) into the center support (518).
  23. Using J 23327 spring compressor compress the 2nd coast clutch spring (529).
  24. Install the 2nd coast clutch spring retainer (530) into the center support (518).
  25. Remove J 23327 spring compressor .

  26. Object Number: 952049  Size: SH
  27. Install the 2nd coast clutch spacer (531) into the center support (518).
  28. Install the 2nd coast clutch plates. Starting with the 2nd coast clutch plate (532) with external splines. Alternate with the 2nd coast clutch plate (533) with internal splines. Refer to Clutch Plate Selection Specifications.
  29. Install the 2nd coast clutch backing plate (534).
  30. Install the 2nd coast clutch backing plate retainer ring (535).

  31. Object Number: 952092  Size: SH
  32. Measure the distance between the 2nd coast 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 2nd coast 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 2nd coast clutch pack travel. Refer to Clutch Piston Travel Specifications.

  35. Object Number: 801857  Size: SH
  36. Use the J 46240-1 seal protector  (2), J 45688 pusher  (1) and the J 45136 seal protector  (3) to install the low and reverse clutch piston (517) into the center support (518).

  37. Object Number: 952038  Size: SH
  38. Use J 23327 spring compressor , compress the low and reverse clutch piston spring (516).
  39. Install the low and reverse clutch spring retainer ring (515) into the center support (518).

  40. Object Number: 952035  Size: SH
  41. Install the low and reverse apply plate (514) into the center support (518).
  42. Install the low and reverse clutch plates. Start with the low and reverse clutch plate (513) with external splines. Alternate with the low and reverse clutch plate (512) with internal splines. Refer to Clutch Plate Selection Specifications .
  43. Install the low and reverse clutch backing plate (511) and the retainer ring (510) into the center support (518).

  44. Object Number: 952099  Size: SH
  45. Measure the distance between the low and 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.
  46. Apply 65 PSI (448.17 kPa) of air pressure to the specified port. Measure the distance between the low and 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.
  47. Subtract H2 from H1 this is the low reverse clutch pack travel. Refer to Clutch Piston Travel Specifications.

  48. Object Number: 951884  Size: SH
  49. Using J 45127 removal tool install the center support (18) into the case.