GM Service Manual Online
For 1990-2009 cars only

Transmission Overheats

Checks

Cause

TCC Circuit

Blockage during apply or release

TCC Valve Spring (224)

The spring is broken

Pump Cover (206)

Cross channel leakage

Pressure Regulator Valve (231)

The valve is stuck in a high demand position

Oil Cooler

The cooler or the cooler lines are blocked

Gasket (6)

The gasket is damaged

Retainer Pin (211)

The pin is broken

Turbine Shaft O-ring (2)

The O-ring is damaged

Turbine Shaft Seals (503)

The seals are damaged

Stator Shaft Bushing (233)

The bushing is worn or damaged

Oil Transfer Hole Cup Plug

The plug is leaking

Fluid

The fluid level is low

Radiator

Air flow is restricted