Theory Of Operation
WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
The Transmission Control Module (TCM) monitors the actual Output Shaft speed signal and compares it to the calculated output speed determined from the Wheel Speed signal that is received over the Controller Area Network (CAN). If the difference between the speed values is above a calibrated threshold, this DTC will set.