The JR-TRX406-HD outer portal drive housing is a brass replacement designed for use on Traxxas TRX-4 axles. It provides the external housing for portal gear assemblies and is intended to substitute the factory outer portal housings on compatible TRX-4 crawler projects.
Built from brass for added strength and scale appeal, this housing offers a tougher external surface than stock plastic parts. The metal shell affects mounting interfaces on the portal assembly and is commonly used where durability or a more realistic metal look is desired.
Installation advice: remove the original outer portal housing and fit this brass unit to the corresponding portal gear assembly on the TRX-4 chassis. Confirm thread engagement and check for interference with brake and suspension link locations. Always verify gear mesh and secure fasteners to the correct torque to avoid wear.
As a metal upgrade, the brass outer portal housing suits builders wanting a robust, scale-accurate shell; double-check fitment with your TRX-4 portal components during assembly.
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