Power Transfer Unit Case Description and Operation: General Description
WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
The power transfer unit (1) is positioned in the right side of the vehicle and mounts to the transmission and the engine. The primary function of the power transfer unit (1) is to receive power from the transmission and transfer it using helical and hypoid gear sets through the propeller shaft to the rear differential. The power transfer unit (1) main housing, extension housing, and rear output shaft housing are of a cast aluminum design.