GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • DT 46451 (DW240-020) Brake Clutch Spring Compressor
    • DT 46453 (DW240-040) Direct Clutch Adapter

    Notice: Refer to Compressed Air Should Not Exceed 98 kPa (14 psi) Notice in the Preface section.


    Object Number: 1246020  Size: SH
  1. Install the direct clutch and thrust needle roller bearing on the oil pump.
  2. Using a dial indicator, measure the direct clutch piston stroke while applying and releasing 392 kPa (57 psi) of compressed air.
  3. If the stroke is non-standard, inspect the discs, the plates, and the flange.

    Specifications
    The piston stroke is 0.4-0.8 mm (0.016-0.031 in).


    Object Number: 1246019  Size: SH
  4. Using the screwdriver, remove the snap ring.

  5. Object Number: 1246018  Size: SH
  6. Remove the flange (1), 2 discs (2), and 2 plates (3).

  7. Object Number: 1246017  Size: SH
  8. Place the DT 46451  (1) and DT 46453  (2) on the direct clutch return spring and compress.
  9. Notice: Do not depress the direct clutch piston return spring lower than 1-2 mm (0.039-0.078 in.) beyond the snap ring groove. This will prevent the direct clutch piston return spring from becoming distorted.

    Important: Do not expand the snap ring excessively.

  10. Using a snap ring expander, remove the snap ring.

  11. Object Number: 1246022  Size: SH
  12. Remove the direct clutch return spring.

  13. Object Number: 1246024  Size: SH
  14. Install the direct clutch on the oil pump.
  15. Notice: Refer to Compressed Air Should Not Exceed 98 kPa (14 psi) Notice in the Preface section.

    Important: Air pressure may cause the pistons to jump-out. When removing the piston, hold it with your hand using a waste cloth.

    Important: Do not splash ATF when air-blowing.

  16. Apply 392 kPa (57 psi) of compressed air to the oil pump to remove the direct clutch piston.
  17. When the piston can not be removed as it is slanted, either blow the air again with the protruding side pushed or remove the piston using needle nose pliers with vinyl tape on the tip.


    Object Number: 1246021  Size: SH
  18. Using a small screwdriver, remove the O-ring (1) from the direct clutch piston.

  19. Object Number: 1246025  Size: SH
  20. Remove the O-ring (1) from the input shaft.

  21. Object Number: 1246028  Size: SH

    Important: Do not expand the ring ends excessively.

  22. Remove the 2 seal rings (1) from the input shaft.