GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 8001 Dial Indicator Set
    • J 25025-B Guide Pin Set

    Object Number: 28398  Size: SH
  1. Assemble the J 25025-B by attaching the threaded rod and the dial indicator holder to one of the case extension bolt holes on the transmission case assembly (7).
  2. Push in the output shaft assembly (671) to remove any slack.
  3. Assemble the J 8001-3 onto the dial indicator holder. Index the J 8001-3 to the end of the output shaft (671).
  4. Set the J 8001-3 to 0.
  5. Move the output shaft (671) in and out, noting the amount of end play. The correct end play is between 0.127-0.635 mm (0.005-0.025 in).
  6. Important: During reassembly, the rear unit end play check must be repeated in order to verify the accuracy of the selective washer.

  7. Record this measurement for future reference.
  8. Remove the tools.