GM Service Manual Online
For 1990-2009 cars only

Transmission Overheats

Checks

Causes

TCC Circuit

Blockage during apply or release

Pump Cover (215)

Cross channel leakage

Pressure Regulator Valve (216)

The valve is stuck in a high demand position

Oil Cooler

The cooler or the cooler lines are blocked

Oil Pan Gasket (73)

The gasket is damaged

Turbine Shaft O-ring (618)

The O-ring is damaged

Turbine Shaft Seals (619)

The seals are damaged

Stator Shaft Bushings (234/241)

The bushing is worn or damaged

Fluid

The fluid level is low

Radiator

Air flow is restricted or internal blockage