Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Power Transfer Unit (PTU)
The Power Transfer Unit (PTU) is a gearbox that attaches to the transaxle. On automatic transaxle vehicles, 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. The PTU on an automatic transaxle vehicle uses 0.35L (12 oz) of Motorcraft SAE 75W-140 synthetic lubricant. The PTU on a manual transaxle vehicle uses 0.35L (12 oz) of Motorcraft 80W-90 synthetic lubricant.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.