Power Transfer Unit (PTU)

Power Transfer Unit (PTU)
The power transfer unit (PTU) is a gearbox that attaches to the transaxle. The RH intermediate shaft passes through the PTU and engages the differential side gear as in normal front wheel drive (FWD) applications. The PTU directs power to the rear driveshaft through a helical gear spline coupled to the transaxle differential case, a helical gear drop (idler gear) and hypoid/helical ring gear assembly and pinion set. The PTU is sealed from the transaxle and has its own oil sump.

Repair of the PTU is limited to the seals, dust covers and the output flange only. If any of the geared components, bearings, case cover or internal shafts are damaged or worn, a new PTU must be installed.