Power Transfer Unit (PTU)

Power Transfer Unit (PTU)
The four wheel drive (4WD) system consists of the following:
^ Power transfer unit (PTU)
^ Rear driveshaft
^ Coupling device control module (4WD control module)
^ Rear axle with coupling device

The PTU is a gearbox that attaches to the transaxle. Torque from the engine goes through the transaxle to the PTU. Torque is transferred from the driveshaft to the rear axle, which drives the rear halfshafts.

Serviceable components of the PTU are limited to the seals, the halfshaft dust cover and the output flange. No internal components are serviced. There should be no need to remove the PTU cover. If any of the internal geared components, bearings, case cover or internal shafts are worn or damaged, a new PTU must be installed.