General Description

The Borg-Warner 4472 is a three-piece aluminum, chain driven, viscous clutch-type transfer case. This is used in a system in which all-wheel drive is always activated. The all-wheel drive is automatic and has no external controls.

The viscous clutch used in the 4472 is a torque distribution device and is non-serviceable. The internal construction of the viscous clutch consists of alternating plates that are connected to the front and rear outputs of the transfer case. The clutch is filled with high-viscosity oil which flows through slots in the plates. The oil's resistance to sheering causes the plates to transmit torque at the needed ratio to the front or rear wheels. The ratio that torque is transmitted is approximately 35 percent front, 65 percent rear.