This differential flange serves as the mounting interface between the differential carrier and the axle housing on the host tractor. It positions the differential assembly within the axle center section and provides the sealing surface that retains lubricating oil in the differential cavity. A damaged or warped flange face allows oil to migrate past the gasket, leading to lubricant loss and potential gear or bearing damage. This original-manufacturer component is machined to the same face-flatness and bolt-hole pattern as the assembly it replaces, so no shimming or reaming is required during installation. Replace the gasket on reinstall and torque the mounting bolts to specification.