Enclosure for the differential and pinion gears. Can be removable are integral part of axle housing. Also called differential housing
A friction reducing bearing that uses a series of steel balls held between inner and outer bearing races, such as in a roller clutch.
A suspension device made up of a flexible bladder containing compressed air. The airspring takes the place of a conventional coil or leaf spring. Air is supplied by onboard compressor, usually with auxiliary equipment two cents vehicle height modify the pressure in the air spring as needed.