The Crown Wheel Pinion also known as crown wheel and pinion are pair of gears that found in a drive wheel of vehicle at the end of the shaft driving the crown wheel. The pinion is generally smaller that the crown wheel and turn quickly to produce forward motion. Pinions are bevel gear that helps the rotation of two shafts at various speeds. It is used on the rear axle of automobiles to allow wheels to rotate at diverse speeds. The Crown Wheel Pinion is used on the rear axle of automobiles to allow wheels to rotate at different speeds.