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2014 Jeep Cherokee Trailhawk 4 Drivetrain

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Churning behind the nine-speed ZF transmission is a PTU (power transfer unit) and a set of very unique differentials. Since the Cherokee is a front-wheel-drive-based vehicle, it uses the PTU to send power to the rear differential. With no transfer case onboard, the low range gear reduction is handled by planetary gears affixed alongside each of the differential assemblies.