GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 45200 Dial Indicator Set
    • J 45166 8" Dial Indicator Extension Rod

    Object Number: 749688  Size: SH
  1. Install the forward and direct clutch assembly (23) onto the transmission case cover (19).
  2. Remove the inner forward clutch accumulator cover bolt/screw (617) from the forward clutch accumulator assembly. Install J 45166  (2) in place of the removed bolt.
  3. Assemble J 45200  (3) and J 45166  (2) onto the transmission case cover (19) (see inset) and set the dial indicator to zero.
  4. Check forward clutch piston (565) travel. Cover the forward clutch accumulator housing (1) with a shop rag to prevent fluid from spraying out the top of the accumulator housing when compressed air is applied to the passage (C1).
  5. Caution: When you use compressed air in order to clear fluid passages and to dry parts, always aim the air pressure away from face and eyes. Always wear adequate eye protection in order to avoid injury from dirt and debris that may adhere to parts.

  6. Apply compressed air in order to measure the forward clutch piston (565) stroke (see inset).
  7. If the forward clutch piston stroke is not within specifications, select another backing plate. Refer to Forward Clutch (C1), Piston Bore Stroke in Transmission Clearance Specifications .