GM Service Manual Online
For 1990-2009 cars only

Special Tools

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

    Object Number: 1850801  Size: SH
  1. Install the J 45166  (1) in one of the holes of the transmission case.
  2. Install the J 45200  (2) on the J 45166  (1).
  3. Set the dial indicator pointer on the low and reverse clutch backing plate and zero the gage.
  4. Warning: 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.

  5. Apply compressed air to the case fluid passage as shown in the insert and measure the piston stroke.
  6. Specification
    Low and reverse piston stroke: 1.39-2.21 mm (0.054-0.087 in)

  7. If the piston stroke measurement is not within specifications, ensure proper installation of the clutch discs or the clutch discs are not excessively worn.