Torque Converter Clutch Releases

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Torque Converter Clutch (TCC) Solenoid

As the throttle position changes, the throttle position sensor provides input to the PCM indicating throttle angle. The PCM then lowers the ON/OFF cycle time. Then the PCM de-energizes the TCC solenoid, thereby letting the filtered third clutch fluid exhaust through the solenoid. With filtered third clutch fluid exhausting, the converter clutch control valve moves into the released position.

Converter Clutch Control Valve

When spring force moves the converter clutch control valve to the released position, the valve directs TCC feed limit fluid into the converter release circuit. Converter release fluid is then routed to the torque converter pressure plate and disengages the torque converter clutch. Converter apply fluid from the torque converter clutch pressure plate is then routed back through its circuit to the converter clutch control valve. Converter apply fluid passes through the valve and enters the cooler circuit.