Traxxas drive hub assembly for the T-Maxx 4WD Radion Control Monster Truck This is the replacement drive hub assembly for the Traxxas T-Maxx 4WD Radio Control Monster Truck. This drive hub assembly fits into the spur gear assembly INCLUDED: One Drive Hub Clutch Assembly for the Traxxas T-Maxx. One 6x8x0.5mm teflon washer Required Parts Installing inside transmission on the spur gear assembly