GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

1-2-3-4 Clutch Assembly

    • Inspect for damaged or broken 1-2-3-4 Clutch Piston (461) and piston seals damaged, worn or leaking
    • Inspect for fatigued or binding 1-2-3-4 Clutch Piston Return Spring (460)
    • Inpsect for improper surface finish on 1-2-3-4 Clutch Plates (456-458)

Case Cover Assembly (403)

Inspect for leaking or loose fitting blow off valve