This tapered roller bearing supports the differential assembly within the rear axle housing. It manages both radial and axial loads from the ring and pinion gear set, maintaining proper gear mesh under varying torque. A worn bearing produces a howling or rumbling noise from the axle housing during operation, indicating clearance has increased beyond specification. As an original-manufacturer component, the bearing matches the factory cone and cup geometry, so preload can be set correctly without additional shimming. On installation, clean the housing bore and shaft journal, apply gear oil to the roller surfaces, and torque the bearing cap to specification.