Principles Of Operation

Four Wheel Drive (4WD) Systems - All Wheel Drive (AWD)

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 and then outward to the ring gear and 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 and then to the front output shaft. The differential provides the connection between the ring gear and the overdrive sun gear.