Torque Converter Clutch: Description and Operation

The Torque Converter Clutch (TCC) provides a mechanical link or direct drive between the engine crankshaft and turbine shaft when applied. The application of the torque converter clutch is controlled by the Powertrain Control Module (PCM). Under certain conditions, the PCM sends the appropriate signal to the TCC solenoid which allows fluid pressure within the torque converter to force the TCC piston plate and damper assembly against the cover creating a mechanical link between the engine and transaxle.

Turbine shaft
The turbine shaft connects the torque converter stator with the forward/coast/direct clutch cylinder. When applied, the forward/coast/direct clutch cylinder transmits input torque to the reverse/overdrive ring gear assembly which also acts as the drive sprocket. This allows input torque to be transmitted from the torque converter to the drive chain and driven sprocket.