LOSI PROMOTO-MX 1/4 Transmission Housing by GPM MX038  [MX038]

Transmission housing for PROMOTO-MX

This CNC-style aluminum transmission housing is an RC-scale replacement part designed for LOSI PROMOTO-MX models. Machined from 7075 aluminum, it is intended to provide a stiffer, more durable mounting point for the drivetrain components on the specified PROMOTO-MX RTR and PRO CIRCUIT units. The package includes the housing set and a single 5x13x4 bearing to match the original part numbering, so installers can swap the unit during routine maintenance or as part of a tuning upgrade.

Fitment follows the original geometry and is intended to use existing mounting locations and fasteners from the stock assembly. The component's role is mechanical protection and positional stability for the gearbox and related drivetrain parts rather than altering primary gear ratios or electronics behaviour.

Use this aluminum housing when you need a direct-fit, metal replacement for the listed PROMOTO-MX models to improve long-term drivetrain alignment and simplify maintenance cycles; retain original bearings and fasteners during installation and verify clearances before first run.