XB4 gear differential ended up being totally redesigned both ahead and back and features unique split design of top gear. The differential has greater interior oil volume to improve perseverance regarding the diff action, yet simultaneously it is significantly narrower to suit towards the narrower bulkhead to obtain the rotating fat closer to the centerline. The maintenance-free super-smooth gear diff includes a composite example and cover with interior satellite gears being precision-molded from unique XRAY-developed graphite composite material, ensuring a long lifespan and super-smooth, efficient procedure. Gear differential features redesigned diff-outdrives made for use with 2.5mm pin.