Shift Mechanism
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Operating ranges are selected with a dash mounted shift selector switch. The shift selector switch provides an input to the Drive Train Control Module (DTCM) to indicate the driver's desire to change operating ranges. The DTCM uses this input, along with the input from the transfer case mounted mode sensor and information from the vehicle's CAN C bus, to determine if a shift is permitted. If the DTCM decides the shift is permitted, the DTCM controls the shift motor, mounted to the exterior of the transfer case, to perform the shift.