The XB4 gear diff guarantees increased traction on slippery songs. Recommended also to utilize on bumpy area where it helps to raised absorb the bumps. Larger oil amount stops the diff from overheating, expanding its lifespan. The super-smooth gear diff includes a composite instance and address with exchangeable spur gear. Kit diff set includes 81T spur gear and a range of various spur gears can be acquired as a substitute. The interior gears are precision-molded from tough XRAY developed composite material, ensuring long lifespan and super-smooth, efficient operation. The maintenance-free diff design will gain racers of all amounts. If the diff is precisely built, there's no necessity for upkeep for many yearsÂ… no requirement of regular oil changes, with no leakage due to our superior sealing system.