Symptom Chart

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

Symptom	Possible Sources	Action
TCC does not apply	TCC solenoid filter screen blocked	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 valve body. REFER to: Main Control Valve Body .
TCC control valve stuck OFF		INSTALL a new pump assembly. REFER to: Transmission .
TCC APPLY hydraulic circuit blocked or leaking		DISASSEMBLE and INSPECT the transmission, main control valve body and pump assembly passages for debris/blockage/leaks. CLEAN or REPLACE components as necessary. REFER to: Main Control Valve Body . REFER to: Transmission .
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 valve body. REFER to: Main Control Valve Body .
TCC control valve stuck ON		INSTALL a new pump assembly. REFER to: Transmission .
TCC RELEASE hydraulic circuit blocked or leaking		DISASSEMBLE and INSPECT the transmission, main control valve body and pump assembly passages for debris/blockage/leaks. CLEAN or REPLACE components as necessary. REFER to: Main Control Valve Body . REFER to: Transmission .
TCC welded or damaged.		INSTALL a new torque converter. REFER to: Transmission . REFER to: Forward Clutch Assembly .
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 valve body. REFER to: Main Control Valve Body .
TCC control valve, springs, clips loose, stuck, binding, missing, misassembled		INSTALL a new pump assembly. REFER to: Transmission .
TCC RELEASE/TCC APPLY hydraulic circuit blocked or leaking		DISASSEMBLE and INSPECT the transmission, main control valve body and pump assembly passages for debris/blockage/leaks. CLEAN or REPLACE components as necessary. REFER to: Main Control Valve Body . REFER to: Transmission .
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 . REFER to: Forward Clutch Assembly .