The front and rear differential comes completely assembled and ready to install in your 8s X-Maxx, X-Monster, XRT. Includes: 4140 carbon steel differential Bevel Gear 32T/M1.6 , Front and Rear Pinion Gear 10T and bearings 15x24x5 , center diff output gear 51T/M1.6 , center diff input gear 20T , differential Gear set , 4140 carbon steel+7075 alloy diff case , 7075 alloy Differential gear spacers , spider gear shafts , Diff Case Gasket
Note: There is no differential oil, it needs to be added by yourself. It is recommended to use differential oil, Front: 20WT=200CST, Rear: 30WT=350CST, Center: 80WT=1000CST