GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 22269-01 Accumulator and Servo Piston Remover
    • J 29714-A Servo Cover Depressor

    Object Number: 7758  Size: SH
  1. Inspect the 4th apply piston (25), the 2-4 servo cover (28), the 2nd apply piston (17), and the servo piston inner housing (20) for the following conditions:
  2. • Cracks
    • Scoring
    • Burrs and nicks
  3. Install the following seals:
  4. • The 4th apply piston outer oil seal ring (26) on the 4th apply piston (25).
    • The 2-4 servo cover O-ring seal (27) on the 2-4 servo cover (28).
    • The 2nd apply piston outer (18) and inner (19) oil seal rings on the 2nd apply piston (17).
    • The O-ring seal (21) on the servo piston inner housing (20).

    Object Number: 55932  Size: SH
  5. Install the servo cushion outer spring (16), the servo cushion inner spring (105) (model dependent) and the cushion spring retainer (15) in the 2nd apply piston (17).
  6. Use the J 22269-01 and compress the second apply piston assembly (17).
  7. Install the second apply piston retaining ring (14).

  8. Object Number: 7760  Size: SH
  9. Assemble the 2-4 servo components in the order shown: (12-15, 17, 20, 22-25, 28, 29).

  10. Object Number: 207615  Size: SH
  11. Install the 2-4 servo assembly into the 2-4 servo bore.

  12. Object Number: 5426  Size: SH
  13. Install the J 29714-A .

  14. Object Number: 5427  Size: SH
  15. Tighten the bolt on the J 29714-A in order to compress the servo cover.

  16. Object Number: 207613  Size: SH
  17. Install the servo cover retaining ring.