Power Transfer Unit

The Power Transfer Unit (PTU) comprises a main housing, a right side cover, dog clutch and cam ring actuator.

Within the housing the main components are the following:

• A crown wheel drive gear and shaft.
• A pinion drive gear and shaft.
• An input shaft.
• A dog clutch assembly cam ring actuator.

The PTU is located at the rear of the engine and is attached directly to the right of the transmission housing. A bracket on the PTU attaches the unit to the engine cylinder block.

When required, the PTU transfers the output from the transmission and distributes it to the rear wheels through a 2-piece driveshaft to the RDU. The front halfshafts are driven from the transmission front differential, not the PTU.

The PTU contains a dog clutch and brake to disconnect the AWD upstream of the PTU hypoid gears.

The PTU is equipped with a Driveline Disconnect Control Module (DDCM), which controls the PTU motor for connecting and disconnecting. This is linked to, and controlled by the AWDCM.

For additional information, Refer to: POWER TRANSFER UNIT .