Torque-On-Demand Clutch
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The transfer case is equipped with an electronically controlled clutch which is located inside the case. This clutch is used to transfer torque in 4WD AUTO (4A) mode. The clutch consists of a transfer case field coil, ball and ramp or cam plate, and a multi-disc friction and steel clutch pack.