Transmission Control Module (TCM)
WARNING: This page is about a different car, the 2006 Lincoln Navigator and 2006 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
The TCM uses the high speed CAN (Navigator only). The TCM controls transmission shifting, the electronic pressure control, and the torque converter clutch. For additional information, refer to AUTOMATIC TRANSMISSION - 6HP26 .