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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Service, Diagnosis & Troubleshooting) >> Transmission Overheats

Transmission Overheats

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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