This is the Traxxas rear ring gear, differential and pinion gear.
Every part of X-Maxx has been overbuilt for brutal performance, including the biggest, baddest steel differential gears Traxxas has ever produced. However, we have something for the enthusiast who pushes the performance envelope to the absolute edge. All-new machined, spiral cut gears are now available to give you a virtually bullet-proof drivetrain that can handle the most extreme punishment your X-Maxx may encounter.
Includes: Machined, spiral cut X-Maxx ring and pinion gear