Reduce or eliminate driveline vibration with a CV-equipped driveshaft. Constant Velocity (CV) joints use two U-joints (double cardan style) in the place of a single U-joint. This smooths out the driveline angle and reduces vibration due to extreme lifts or driveline changes. Works with stock to 6 in. lift. This front driveshaft from Rugged Ridge fits all 07-16 Jeep Wrangler and features a double-cardan joint. Reduce or eliminate driveline vibration with a CV-equipped driveshaft. Constant Velocity (CV) joints use two U-joints (double cardan style) in the place of a single U-joint. This smooths out the driveline angle and reduces vibration due to extreme lifts or driveline changes. Works with stock to 6 Inch lift. Reduce or eliminate driveline vibration with a CV-equipped driveshaft. Constant Velocity (CV) joints use two U-joints (double cardan style) in the place of a single U-joint. This smooths out the driveline angle and reduces vibration due to extreme lifts or driveline changes. Works with stock to 6 Inch lift. Will not work CRD motor.