XB4 gear differential ended up being completely redesigned both ahead and back and features unique split design of crown gear. The differential has greater internal oil volume to improve consistency regarding the diff action, yet simultaneously it really is significantly narrower to fit to the narrower bulkhead to go the rotating fat closer to the centerline. The maintenance-free super-smooth gear diff includes a composite instance and cover with interior satellite gears being precision-molded from unique XRAY-developed graphite composite material, ensuring a lengthy lifespan and super-smooth, efficient operation. Gear differential features redesigned diff-outdrives made for usage with 2.5mm pin.