Symptom Chart

Torque Converter Clutch

For torque converter clutch operation, REFER to: Torque Converter Clutch (TCC) .

Symptom	Possible Causes	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 the bore or valve is damaged or if the spring is damaged or missing, INSTALL a new main control valve body. REFER to: MAIN CONTROL VALVE BODY .
Pump stator bushing and/or input shaft worn		REMOVE, CLEAN and INSPECT the pump assembly, the input shaft and the torque converter. If the pump stator bushing and/or the input shaft are worn, INSTALL a new pump assembly, input shaft and torque converter. REFER to: TRANSMISSION
TCC APPLY hydraulic circuit blocked or leaking		DISASSEMBLE and INSPECT the transmission, main control and pump assembly passages for debris/blockage. CLEAN as necessary. INSPECT the TCC hydraulic circuits for leaks. REFER to: MAIN CONTROL VALVE BODY . REFER to: TRANSMISSION . REFER to: Torque Converter Clutch (TCC) .
TCC friction material worn or damaged.		INSTALL a new torque converter. REFER to: TRANSMISSION
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 the bore or valve is damaged or if the spring is damaged or missing, INSTALL a new main control valve body. REFER to: MAIN CONTROL VALVE BODY .
TCC RELEASE hydraulic circuit blocked or leaking		DISASSEMBLE and INSPECT the transmission, main control and pump assembly passages for debris/blockage. CLEAN as necessary. INSPECT the TCC hydraulic circuits for leaks. REFER to: MAIN CONTROL VALVE BODY . REFER to: TRANSMISSION . REFER to: Torque Converter Clutch (TCC) .
TCC welded or damaged.		INSTALL a new torque converter. REFER to: TRANSMISSION .
TCC cycles, shudders or chatters	Incorrect Transmission Strategy programmed into the PCM / TCM	PERFORM transmission strategy download and the adaptive learning drive cycle. REFER to: TRANSMISSION STRATEGY DOWNLOAD . REFER to: ADAPTIVE LEARNING DRIVE CYCLE .
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 the bore or valve is damaged or if the spring is damaged or missing, INSTALL a new main control valve body. REFER to: MAIN CONTROL VALVE BODY .
TCC RELEASE/TCC APPLY hydraulic circuit blocked or leaking		DISASSEMBLE and INSPECT the transmission, main control and pump assembly for debris/blockage. CLEAN as necessary. INSPECT the TCC hydraulic circuits for leaks. REFER to: MAIN CONTROL VALVE BODY . REFER to: TRANSMISSION . REFER to: Torque Converter Clutch (TCC) .
TCC cycling/shudder/chatter		VERIFY shudder using a scan tool to compare and record TSS and engine RPM during TCC lock up. Use the recording to verify the amount of shudder. 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. INSTALL a new torque converter. REFER to: TRANSMISSION .