Overdrive Range, Fourth Gear - Torque Converter Clutch Applied: Notes
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.
The torque converter clutch applies during fourth gear operation after the Transmission Control Module (TCM) receives the appropriate input signals to energize the torque converter clutch (TCC) solenoid. To apply the torque converter clutch, the following changes take place in the electrical and hydraulic systems: