GM Service Manual Online
For 1990-2009 cars only

    Object Number: 28387  Size: SH
  1. Remove the manual 2-1 band servo assembly (55-58).
  2. Remove the servo piston cushion spring (60).
  3. Inspect the servo piston cushion spring (60) for distortion.
  4. Inspect the servo piston case bore for wear and scoring.