TRAXXAS TRX4 Aluminum Outer Portal Case, Front or Rear - TRX4021A/2 by GPM  [TRX4021A/2]

Aluminum outer portal drive housing for TRX4

This aluminium outer portal drive housing fits the TRAXXAS TRX4 Trail Crawler platform as a direct swap for the stock plastic outer portal cases on front or rear axles. Its role is to reduce movement in the knuckle-arm inner gears and promote smoother meshing during low-speed crawling.

Manufactured from 6061 T6 aluminium, the unit is CNC machined with a 3D profile to balance reduced mass and retained strength. It is designed to install with the adjacent original plastic components, so major chassis alteration is not usually necessary for correct fitment.

Supplier details indicate the item is supplied as a 36pcs set and that stainless steel cap head screws are supplied for assembly, 32 pcs. This part is an RC-scale upgrade aimed at improving durability and gear stability for trail and rock crawling rigs.

Choose this aluminium housing when you require a firmer, more dimensionally stable outer portal case to reduce play in knuckle arm gears and help maintain smoother operation on demanding courses.