The GPM MKV647S centre differential is engineered from 20CrMnTi steel and 7075 aerospace-grade aluminium to provide durable service in ARRMA drivetrains. Supplied fully assembled, the unit uses a 47T 1.0 Module straight-cut main gear to reduce wear under high torque, while 4140 carbon steel cross shafts increase torsional stiffness. Rubber shielded bearings ensure consistent bearing performance and simplify installation. Note: Differential oil is not included and must be added separately. For installation, refer to the ARRMA manual.