GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 38678-A Second Clutch Piston Assembly Tool contains:

    • J 38678-A -1 Protector
    • J 38678-A -2 Installer
    • J 38678-A -3 Adapter

    Object Number: 10667  Size: SH
  1. Install J 38678-A -3 into the new second clutch piston assembly (620).
  2. Install the piston and J 38678-A -3 into J 38678-A -1 protector.
  3. Install the piston assembly into the second clutch housing assembly (617).
  4. Important: Carefully center the inner seal protector onto the hub by pushing down on the center of J 38678-A -1.

  5. Insert the legs of J 38678-2 installer into the slots of J 38678-A -1 protector.
  6. Using your hand, press down on the installer J 38678-A -2 until the piston is seated.

  7. Object Number: 10668  Size: SH
  8. Assemble the second clutch spring assembly (621) into the second clutch housing assembly (617).
  9. Install the snap ring (622) in the second clutch housing.

  10. Object Number: 10659  Size: SH
  11. Install the waved plate (623) into the second clutch housing (617).
  12. Install the apply plate (716) into the second clutch housing, with the marking DN or DOWN toward the piston.
  13. Install a fiber plate (624), followed by a steel plate (625) into the second clutch housing.
  14. Assemble remaining plates, alternating between steel and fiber.
  15. Install the backing plate (626) into the second clutch housing, with the machined side facing up and the smooth side facing down.
  16. Install the snap ring (627) into the second clutch housing.