GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

Case Cover

Damaged

Case Cover Gaskets

Damaged or displaced

Checkball in Piston

Missing

Driven Sprocket Support

    • Porosity or broken
    • Feed holes blocked

Driven Sprocket Support Bolts

Loose, not in grooves, mislocated

Driven Sprocket Support Seals

Leaking

Fluid Pressure

Too low

Lo/Reverse Anchor Pin

Anchor pin broken or not positioned

Reaction Carrier Shell

Missing, teeth damaged

Reverse Band

Broken, worn not anchored

Reverse Band Apply Pin

    • Too short or binding in case
    • Broken

Reverse Clutch Fiber Plates

Splines or friction material worn

Reverse Clutch Housing

Cracked

Reverse Clutch Piston

Binding in case

Reverse Clutch Piston Seals

Leaking, damaged or worn

Reverse Clutch Spring Assembly

Jammed

Reverse Clutch Steel Plates

Splines worn

Reverse Servo Piston

    • Bad seal
    • Damaged housing

Snap Ring

Out