The GPM SST100S is a precision-focused ball differential designed for Traxxas Latrax Rally, Stadium Super Truck and Teton platforms. It retains the original ball bearings and thrust washer layout and adds durable steel and aluminium parts plus a Delrin pulley and aluminium output cups to ensure consistent adjustment response. The screw adjustment allows repeatable tuning of diff action so you can optimise torque bias and handling under varied conditions.