No Torque Converter Clutch (TCC) Apply (300 RPM Slip)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

No Torque Converter Clutch (TCC) Apply

Checks	Causes
Valve Body Assembly (60)	Regulator apply valve side loading Stuck converter clutch valve TCC apply valve stuck closed (debris in bore) TCC/PWM solenoid broken/cracked Turbine shaft O-ring omitted TCC/PWM solenoid leaking
Input Housing and Turbine Shaft Assembly (621)	Turbine shaft hole not drilled to full depth Scratched turbine shaft journals Turbine shaft O-ring omitted/damaged Turbine shaft retainer and ball assembly restricted or damaged
Electrical	12 volts not supplied to transmission Outside electrical connector damaged Inside electrical connector damaged Wire harness damaged TCC solenoid damaged Electrical short (pinched wire) TCC solenoid not grounded
Torque Converter Clutch (1)	Internal damage (blue or distorted)
Oil Pump Assembly (4)	TCC spring cocked Orifice cup plug restricted or damaged Pump to case gasket mispositioned Converter clutch valve retaining ring mispositioned Converter clutch valve stuck or assembled backward
Transmission Fluid Pressure Manual Valve Position Switch (69)	Contamination Damaged seals
Solenoid Screen (367A/367B)	Blocked
TCC Solenoid Valve (Part of 66)	Internal damage
Engine Speed Sensor	Internal damage
Engine Coolant Temperature Sensor	Internal damage
Automatic Transmission Fluid Temperature Sensor (Part of 69)	Internal damage
Brake Switch	Internal damage
PCM	Internal damage
TCC PWM Solenoid (Part of 66)	Internal damage