Complete gear differential set the X4. Includes updated composite differential situation and cover with pulley. Differential gears are produced from tough composite material, precision-molded composite gears combined with light aluminum hardcoated outdrives, which create a lighter and super-smooth gear differential. The diff case is made for X4 platform and features small bleeding holes for the M2.5x8mm screws, to reduce the opportunity of stripping the diff case when tightening straight down the screws. The bleeding holes additionally allow excess oil to empty away. The form associated with the diff instance has been updated for a more centered rear belt position that improves persistence & forward traction. The advantage of the gear diff is that it really is maintenance-free. When the diff is properly built you don't have for upkeep for a very long time. You don't have to alter oil on a regular basis, and there's no leakage as a result of the good sealing system. The gear diff additionally increases on-power steering which can be needed on virtually all forms of tracks. Works great for both carpet and asphalt tracks. This differential just isn't factory pre-assembled.