Many rear-wheel and four-wheel-drive vehicles rely on a set of bearings to suspend the drive axle so that it can rotate freely with minimal friction. The axle shaft bearing is mounted in the axle housing at the end closest to the wheel. When the axle shaft is inserted into the axle housing, it passes through the bearing and into the differential (gear box).
Made of high strength steel to support the weight of your vehicle, the axle bearings are pressed into the axle housing and are lubricated with the gear oil that is also installed in the housing.
This is demo Question
This is demo Answer