Torque Converter Clutch (TCC)

For TCC operation, REFER to: Transmission Description . Refer to: Torque Converter Clutch (TCC) .

Symptom Chart

Symptom	Possible Sources	Action
TCC does not apply	Solenoid filter blocked to the TCC solenoid	INSTALL a new TCC solenoid. Refer to: Solenoid .
TCC solenoid mechanically stuck OFF		INSTALL a new TCC solenoid. Refer to: Solenoid .
TCC regulator valve stuck OFF		DISASSEMBLE, CLEAN and INSPECT the TCC regulator valve. If bore or valve is damaged, INSTALL a new main control. Refer to: Main Control Valve Body .
TCC control valve stuck OFF		DISASSEMBLE and INSPECT the pump assembly for debris/blockage. CLEAN as necessary. Refer to: Pump Assembly .
TCC APPLY hydraulic circuit blocked or leaking		DISASSEMBLE and INSPECT the transmission, main control and pump assembly passages for debris/blockage. Refer to: Main Control Valve Body . Refer to: Transmission . CLEAN as necessary. INSPECT the TCC hydraulic circuit leak paths, REFER to: Leakage Inspection .
TCC friction material worn or damaged.		INSTALL a new torque converter. Refer to: Transmission Refer to: Forward Clutch Assembly .
TCC always applied/stalls vehicle	TCC solenoid mechanically stuck ON	INSTALL a new TCC solenoid. Refer to: Solenoid .
TCC regulator valve stuck ON		DISASSEMBLE, CLEAN and INSPECT the TCC regulator valve. If bore or valve is damaged, INSTALL a new main control. Refer to: Main Control Valve Body .
TCC control valve stuck ON		DISASSEMBLE and INSPECT the pump assembly for debris/ blockage. CLEAN as necessary. Refer to: Pump Assembly .
TCC RELEASE hydraulic circuit blocked or leaking		DISASSEMBLE and INSPECT the transmission, main control and pump assembly passages for debris/blockage. Refer to: Main Control Valve Body . Refer to: Transmission . CLEAN as necessary. INSPECT the TCC hydraulic circuit leak paths, REFER to: Leakage Inspection .
TCC welded or damaged.		INSTALL a new torque converter. Refer to: Transmission .
TCC cycles, shudders or chatters	Incorrect Transmission Strategy programmed into the PCM	Refer to: Transmission Strategy Download .
TCC solenoid filter or seal damaged at TCC solenoid		INSTALL a new TCC solenoid. Refer to: Solenoid .
TCC solenoid mechanically sticking		INSTALL a new TCC solenoid. Refer to: Solenoid .
TCC regulator valve, springs, clips loose, stuck, binding, missing, misassembled		DISASSEMBLE, CLEAN and INSPECT the TCC regulator valve. If bore or valve is damaged, INSTALL a new main control. Refer to: Main Control Valve Body .
TCC control valve, springs, clips loose, stuck, binding, missing, misassembled		DISASSEMBLE and INSPECT the pump assembly for debris/blockage. CLEAN as necessary. Refer to: Pump Assembly .
TCC RELEASE/TCC APPLY hydraulic circuit blocked or leaking		DISASSEMBLE and INSPECT the transmission, main control and pump assembly for debris/blockage. Refer to: Main Control Valve Body . Refer to: Transmission . CLEAN as necessary. INSPECT the TCC hydraulic circuit leak paths, Refer to: Leakage Inspection .
TCC cycling/shudder/chatter		Verify the TCC is causing the concern. Attempt to duplicate event while commanding the PID TCC_OSC OFF. If the concern cannot be duplicated while the TCC is commanded off the TCC may be worn or damaged. Refer to: Transmission .