How does a Power Transfer Unit (PTU) primarily function in a Jeep?

The primary function of a Power Transfer Unit (PTU) in a Jeep is to distribute power to the front wheels, particularly in vehicles equipped with all-wheel drive or full-time four-wheel drive systems. The PTU takes power generated by the engine and transfers it from the transmission to the front axle, allowing the front wheels to receive torque as needed. This is essential for maintaining traction in various driving conditions, especially when the vehicle is navigating off-road terrain or in adverse weather conditions.

By enabling this distribution of power, the PTU plays a crucial role in enhancing the vehicle's stability, control, and overall performance. The capability to deliver power effectively to the front wheels complements the engagement of the rear wheels, ensuring that the vehicle can maintain drive and safety under challenging circumstances.

Other choices may mention aspects like increasing engine size or reducing fuel consumption, which are not relevant to the specific function of the PTU. Enabling full-time 4WD is a broader feature related to the vehicle's drivetrain configuration and may involve various components, not limited to just the PTU.