Torque Converter Clutch (TCC)

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The TCC provides a mechanical link or direct drive between the engine crankshaft and turbine shaft when applied. The application of the TCC is controlled by the 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 dampener assembly against the cover creating a mechanical link between the engine and transaxle called torque converter lock-up.

Lock-up temperature for the torque converter is based on initial TFT with the key in the ON position. If the TFT reads below 16°C (60°F), the torque converter will lock at 16°C (60°F). If initial TFT is 17°C (63°F) the torque converter will lock at 21°C (70°F). This "warm-up" phase continues until the TFT is approximately 32°C (90°F), at which temperature converter lock-up is available immediately.

At high temperatures, torque converter lock-up is delayed to avoid conditions which might cause a shudder. Delayed torque converter lock-up begins at 79°C (175°F).