PROMOTO-MX Aluminum Transmission Housing 7075 MX038A by GPM  [MX038A]

7075 gearbox housing built for PROMOTO-MX

This 7075 aluminum transmission housing serves as a robust replacement for the LOSI Promoto-MX motorcycle plastic housing. Fabricated from 7075 aluminum as noted in the source, it is designed to reduce flex in the gearbox area and extend drivetrain life on compatible Promoto-MX machines.

The item ships with a single 5x13x4 bearing to suit the existing mounting interfaces. Install it using the bike's original fasteners and components; during assembly check bearing seating and shaft alignment to prevent unwanted preload or gear misalignment.

For setups that push motor and ESC output, this housing helps protect internal gears from knocks and wear while maintaining the same service access as the stock unit.

Hobbyists and mechanics fitting this GPM aluminium housing will find a simple swap that improves gearbox rigidity; always confirm fit with the listed models and inspect the bearing during reassembly.