Feature Complete 2 speed transmission Conversion for the Axial SCX10 II Gearbox, Bell housing, Transfer Box and Scale style V8 Engine Motor Cowl Requires a conversion from chassis mounted steering servo to axle mounted servo, or a more forward traverse chassis mounted servo, You may need below servo conversion: 1. axle mounted conversion: MPN S18008 2. chassis forward servo mount: MPN S18012 Specification: Application: Axial SCX10 II AX90046 Material: Metal Color: Silver You will receive: Gearbox Mounting Bracket Pinion Gears Mounting Hardware Instruction Manual