GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

4-5-6 Clutch Assembly

    â€¢ Inspect for leaking 4-5-6 Clutch Piston (433) and Piston Seals (430-432)
    â€¢ Inspect for plugged or restricted 4-5-6 Piston Dam air bleed
    â€¢ Inspect for fatigued 4-5-6 Clutch Piston Spring (434)
    â€¢ Inspect for leaking 4-5-6 Clutch Dam Seals (435)
    â€¢ Inspect for improper surface finish on 4-5-6 Clutch Plates (439-441)
    â€¢ Inspect for porous, improper surface finish, seal groove damage or plugged or restricted oil passages of the 3-5-Rev/4-5-6 Housing (422)