Traxxas TRX-4 Compatible Outer Portal Drive Housing, Black Aluminum JR-TRX406-BK by Jazrider  [JR-TRX406-BK]

This is an RC-scale replacement outer portal drive housing created for Traxxas TRX-4 vehicles and offered by JAZRIDER as model JR-TRX406-BK. It serves as a front/rear outer portal housing in black aluminium for use in scale and trail crawler projects where metal covers are favoured over the factory plastic parts.

The aluminium construction stiffens the portal mounting face and helps retain correct axle alignment when the vehicle is under load or when heavier aftermarket portal gears are installed. This stability can reduce wear on axle bearings and shafts over time.

Installation overview: take off the wheel and remove the existing outer portal housing per TRX-4 service procedures, transfer any internal bearings or seals as needed, then fit the JAZRIDER aluminium housing and secure it with your original fasteners. Check that the driveline turns freely and is aligned before final torqueing. Typical hand tools such as a set of hex drivers will usually do the job.

Purpose: this part acts as a robust structural upgrade that stabilises the portal assembly and pairs well with strengthened driveline components and upgraded suspension parts to improve reliability on demanding terrain.