Molded composite motor gear box made from premium composite material accommodates 3 gears. The graphite molded gear field is lighter and more powerful, with a narrower design to suit the narrower suspension holders, decreasing roll while increasing traction. All parts fit together perfectly, and provide super-easy use of a corner differential. The durable gear box homes the differential and back transmission, allowing the mounting of this rear roll center holder, motor dish, and back shock tower.