Traxxas’s X-Maxx is one big, burly bad ass rig that is built to withstand some substantial abuse. Apparently though, it can be made even stronger. Traxxas has introduced a set of machined, spiral cut gears that make the drivetrain virtually bulletproof!
In addition to the heavy duty spiral cut, these gears are hardened steel for maximum durability and require no modification to install.
Package contains one machined, spiral cut X-Maxx ring gear and one machined, spiral cut X-Maxx pinion gear.
777X Traxxas Machined, Spiral Cut Differential Gears – Front – $45.00
7778X Traxxas Machined, Spiral Cut Differential Gears – Rear – $45.0
[source: www.traxxas.com]