A-Premium CV Axle Shaft Assembly Compatible with Ram 1500 2012-2020 & 1500 Classic 2019-2020, 4WD Models with Standard Suspension Only, Front Left or Right, Replace# 68028398AA, RL028398AA. [Function]: CV axles serve as the final link between the engine and the wheels, transferring power from the vehicle’s transmission and differential to the wheels to drive the vehicle forward.