GM Service Manual Online
For 1990-2009 cars only

No Reverse, Slips in Reverse

Checks

Causes

Reverse Clutch

No apply or slipping

Piston and Seal Assembly (457)

Binding, cracked, or leaking

Inner Seal (456)

Plugged orifice

Clutch Plates (460-463)

Worn friction or broken splines

Snap Ring (459, 464)

Out of position

Housing (454)

Cracked, plugged feed holes, or broken tangs

Housing Retainer and Ball Assembly

Missing or out of position

Springs (458)

Binding

Reverse Clutch Fluid Routing

Fluid leak or restriction

Driven Sprocket Support (95)

    • Leaking seal rings
    • Porosity, damage, misalignment

Channel Plate and Gasket, and Valve Body, Gaskets, and Channel Plate

Porosity, fluid leak across the channels, misalignment, damage, or fluid restriction

Low and Reverse Band and Servo

No apply or slipping

Servo Piston (69)

Broken or binding

Servo Piston Seals (71, 72)

Leaking

Servo Pin (67) and Springs (66, 68)

Binding

Servo Cover (73)

Broken, loose, or leaking

Low and Reverse Band (111)

Broken, worn, or out of position

Anchor Pin (64)

Broken

Fluid Feed Tubes (83)

    • Broken, bent, or plugged
    • Missing or leaking seal rings

Transmission Case (1)

Porosity, fluid leak, or restriction

Shift Linkage

Disconnected or misaligned

Manual Valve (800) and Link (802)

Disconnected or misaligned

#1 Checkball

Missing, no low band fluid

Fluid Level

Low

Fluid Pressure

Low

Refer to High or Low Line Pressure .