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 All-Wheel Drive (AWD) system consists of the following:
- Power Transfer Unit (PTU)
- Rear driveshaft
- 4X4 control module
- Rear axle with coupling device
The PTU is a mechanical device attached to the transaxle. It supplies torque to the rear axle through the rear driveshaft. The 4X4 control module is an electronic device which controls the rear axle coupling to apply the torque generated from the PTU to the rear wheels when required.
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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.