Ring gear, differential/ pinion gear, differential (machined, spiral cut) (rear) Spiral-cut 37-tooth ring and 13-tooth pinion differential gear sets are CNC-machined from a solid block of steel. The teeth are cut with a slight curve to minimize backlash between gears and maximize tooth traction with more surface area than straight-cut gears. Spiral-cut gears are ideal for high-torque, high-speed, brushless applications. Accessory part for these models : - Ford Fiesta ST Rally - Slash 4X4 - 4-Tec 2.0 AWD Chassis - 4-Tec 2.0 Brushless AWD Chassis - 4-Tec 2.0 VXL AWD Chassis - Chevrolet Corvette Stingray - Factory Five #39;33 Hot Rod Coupe - Ford F-150 Raptor R 4X4 - Ford Fiesta ST Rally Brushless - Ford Fiesta ST Rally - Ford GT - Ford Mustang GT - Hoss 4X4 VXL - Rustler 4X4 Brushless - Rustler 4X4 Ultimate - Rustler 4X4 VXL - Rustler 4X4 - Slash 4X4 Brushless - Slash 4X4 Ultimate - Slash 4X4 VXL - Stampede 4X4 Brushless - Stampede 4X4 VXL - Toyota GR Supra GT4 - XO-1
