XB4 gear differential ended up being completely redesigned both ahead and straight back and features unique split design of top gear. The differential has greater interior oil volume to enhance perseverance about the diff action, yet at the same time its notably narrower to accommodate towards the narrower bulkhead to search for the rotating fat closer to the centerline. The maintenance-free super-smooth gear diff includes a composite instance and address with interior satellite gears being precision-molded from unique XRAY-developed graphite composite material, ensuring an extended lifespan and super-smooth, efficient procedure. Gear differential features redesigned diff-outdrives made for use with 2.5mm pin.