Theory Of Operation
WARNING: This page is about a different car, the 2016 RAM 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The Transmission Sump Oil Temperature Sensor is used to determine shift schedule selection. Transmission Oil Temperature is also used in TCC operation. The Transmission Control Module (TCM) monitors the transmission temperature by comparing Transmission Sump Oil Temperature to Torque Converter Fluid Temperature and Engine Coolant Temperature after a cold soak, by comparing Transmission Sump Oil temperature increases in relation to Engine temperature increases, and abnormal changes over time.