Traxxas Diff Pinion Gear 13T (Rear) (Use w/7779 42T Ring Gear) TRA7778 is engineered to restore precise power transfer and maintain peak drivetrain efficiency in your Traxxas vehicle. This durable 13-tooth rear pinion gear ensures a perfect, factory-spec mesh with the Traxxas 7779 42T ring gear.
Replacing a worn or damaged pinion gear with this specific 13T component is crucial for preventing drivetrain strain and extending the life of your differential. Its robust construction provides reliable performance, keeping your RC performing at its best.


Traxxas