Four-Wheel Drive (4WD or 4x4) Systems
On the other hand, four-wheel drive vehicles are typically equipped with a part-time system. These drivetrains allow the driver to manually engage or disengage the power distribution to all four wheels. Under normal conditions, 4WD vehicles primarily operate in two-wheel drive mode, with power usually directed to the rear-wheels to conserve fuel and reduce wear. When additional traction is needed, the driver can activate 4WD, sending power to all four wheels for improved off-road capability. The Jeep model lineup comes exclusively equipped with various iterations of their legendary 4WD or 4x4 drivetrain systems, while most Ram pickup trucks come equipped with a rear-wheel drive biased 4x4 system that allows owners to electronically-engage all four wheels with a simple twist of a dial.