Seen at the ETS series Rd5, Xray have released their complete gear differential set for their T3 chassis. Including composite differential case and cover with pulley, the differential gears are made from a tough composite material, precision-molded composite gears combined with light aluminum hard coated outdrives, which create a lighter and super-smooth gear differential. Not factory pre-assembled, the advantage of the gear diff is that it is maintenance-free. When the diff is correctly built there is no need for maintenance for a very long time. There is no need to change oil on a regular basis, and there is no leakage due to the very good sealing system. 10 grams lighter than the competition, the gear diff also increases on-power steering which is needed on almost all types of tracks. Works great for both carpet and asphalt tracks and fits both 50mm & 52mm drive shafts.