The GPM Aluminum 7075-T6 Front/Rear Gear Box is CNC grade alloy designed to stiffen the differential cradle and surrounding link points including dampers, anti-roll bar and knuckle arms. The high grade aluminium improves thermal conductivity to aid cooling under sustained loads. Enlarged bearing bores provide a firmer seating for smoother differential rotation, and the two-piece case allows accurate alignment and quicker assembly during installation or servicing.