Complete gear differential set the X4. Includes updated composite differential case and address with pulley. Differential gears are produced from tough composite product, precision-molded composite gears combined with light aluminum hardcoated outdrives, which create a lighter and super-smooth gear differential. The diff situation is made for X4 platform and features little bleeding holes the M2.5x8mm screws, to attenuate the opportunity of stripping the diff instance whenever tightening down the screws. The bleeding holes also allow extra oil to drain out. The design associated with diff instance was updated for an even more centered back belt place that improves consistency & ahead traction. The advantage of the gear diff is the fact that it is maintenance-free. Once the diff is properly built there's no necessity for maintenance for many years. There's no necessity to improve oil regularly, and there's no leakage because of the very good sealing system. The apparatus diff additionally increases on-power steering that is required on virtually all kinds of tracks. Works perfect for both carpeting and asphalt tracks. This differential is not factory pre-assembled.