GM Service Manual Online
For 1990-2009 cars only

Checks

Cause

Rear Band (657)

Damaged, worn, or not anchored

Rear Band Apply Pin (73)

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

Piston (65)

The piston is binding in the case.

Seal (66)

Worn or damaged

Cover (62)

Damaged

Gasket (63)

Damaged or missing

Bolt (61)

Loose, broken, or missing

Checkball

    • Missing
    • Damaged
    • Not sealing
    • Incorrect size

Fluid Pressure

Too low

Output Shaft (671)

The shaft or the splines are broken.

Mainshaft (662)

The shaft or the splines are broken.

Thrust Washer (218)

Worn or damaged

Bushing (234)

Worn or damaged