GM Service Manual Online
For 1990-2009 cars only

No Reverse

Checks

Cause

Case (7)

The rear band anchor pin is broken or the pin is not positioned.

Center Support (640)

Leaking at the case, or the support is broken

Center Support Seal (639)

Leaking

Center Support Bolt (25)

    • The bolt is loose or broken
    • The feed hole is blocked

Rear Band (657)

Broken, worn, or not anchored

Rear Band Apply Pin (73)

The pin is too short, or the pin is binding in the case.

Piston (65)

Binding in the case

Seal (66)

Leaking, damaged, or worn

Gasket (63)

Damaged or displaced

Cover (62)

Damaged

Bolts (61)

Broken, loose, or missing

Checkball

Missing

Fluid Pressure

Too low

Direct Clutch Components

  • Reaction Plates (618)

The splines are worn.

  • Friction Plates (611)

The splines or the friction are worn.

  • Spring Assembly (607)

Jammed

  • Housing (623)

Cracked

  • Piston (619)

Leaking

  • Seal (620, 621, 622)

Leaking

  • Ball Check

Leaking