This gear is attached to the diff case and mounts in the front or rear gearbox

and looks great too

The inner foam requires no cutting or trimming of any kind

Removable center hub

headlights

Hot Racing - Steel Spur Gear, 55 Tooth, Gold, for Traxxas 1/16 Scale Bodies 1/7 Scale This gear is attached toHot Racing light weight 55T steel spur gear for the Traxxas 1 16 E Revo, 1 16 Slash 4X4, 1 16 Summit, and other Traxxas 1 16 vehicles. Features: CNC machined light weight hardened steel construction Replaces stock nylon gear Direct replacement for the original and requires no additional parts to install Gold colored ring pressed on gear with tooth count laser etched