Powertrain Control Module
WARNING: This page is about a different car, the 2010 Ford Pickup, 2010 Ford F550 Super Duty, 2010 Ford F450 Super Duty, and 2010 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The operation of the transmission is controlled by the PCM. Various sensors provide information to the PCM. The PCM controls actuators which determine transmission operation.