GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

Fluid Level

Too high or too low

Line Pressure

Too low

Primary Pump

Gears worn or broken

Reverse Accumulator Seal and Housing

    • Seal cut
    • Oversize chamfer in bore

Reverse Band

Damaged, burned, slipping

Reverse Band Anchor Pins

Loose, missing

Reverse Clutch Plates

Damaged or burned

Reverse Clutch Seals

Cut, damaged or leaking

Reverse Servo Pin

Binding, too short

Reverse Servo Piston

Damaged or cracked

Reverse Servo Seals

Cut, damaged or leaking

Scavenge Pipe

Debris in pipe

Scavenge Pipe Seal

Cut or damaged

Scavenge Pump

Gears worn or broken