ARRMA 1/16 MOJAVE GROM / 1/14 TYPHON Differential Outdrive by GPM MGM039S  [MGM039S]

Differential outdrive for ARRMA Grom and Typhon

This GPM MGM039S differential outdrive is an aftermarket, RC-scale replacement part designed for use in ARRMA compact desert truck and buggy differentials. Machined from medium carbon steel, the component is intended to increase wear resistance where the outdrive meets the CVD or dogbone shafts, supporting smoother rotation of the differential assembly without implying any real-vehicle application.

The outdrive installs into standard differential housings used on the listed ARRMA models and serves the functional role of coupling the rotating CVD or dogbone to the diff internals. It is a direct replacement for factory part number ARA311193; confirm fit and orientation against the original part before final assembly. For tuning, consider this as a durability-focused swap that retains original geometry while offering stronger steel at the contact points.