Principles of Operation

Principles of Operation
The automatic, all wheel drive (AWD) transfer case has no external controls. A 2-piece aluminum case houses the assembly. The unit is chain-driven. A differential provides torque to the front and rear transfer case outputs. The differential transmits torque at the ratio of 40% to the front output and 60% to the rear output.

Torque flows through the input shaft to the front planetary gear assembly outward to the ring gear to the upper output shaft. Torque also flows through the front planetary gear assembly to the overdrive sun gear outward to the upper drive sprocket. The torque flow continues from the upper drive sprocket through the drive chain to the lower drive sprocket to the front output shaft. The differential provides the connection between the ring gear and the overdrive sun gear.