A "must have" option for XB4 & XB4 2WD, the ball-differential increases traction and is recommended for low-traction tracks.
The complete factory pre-assembled ball-differential features premium HUDY Spring Steel™ diff outdrives and screw for external adjustment, tough crown gear moulded from high grade extra stiff and reliable self-developed graphite composite mixture, high-performance bearings, high-quality carbide axial thrustbearing, heavy-duty diff washers and ceramic 2.4mm diff balls.
