TRAXXAS TRX4 Trail Crawler Aluminum Rear Knuckle Arms by GPM TRX4022  [TRX4022]

Aluminum rear knuckle arms for TRX4

This GPM TRX4022 aluminum rear knuckle inner set is an RC-scale replacement part designed for TRAXXAS TRX4 Trail Crawler platforms. The kit focuses on stabilizing the inner gear set inside the rear knuckle arms to help maintain smooth gear engagement under trail and crawling loads.

The parts are machined from 6061 T6 aluminum and finished with CNC processes to provide consistent fit and surface quality. The package combines the aluminum inner knuckle pieces with stainless steel cap head screws specified in the kit so you have the hardware required for installation without sourcing additional fasteners.

In tuning terms, these components are intended to increase durability at the rear knuckle junction and to reduce lateral play that can affect gear mesh during low-speed, high-torque maneuvers typical of rock crawling and trail runs. The product is for RC use only and is sized for model-scale assemblies.

Use this kit when replacing worn rear knuckle inner parts or when seeking a stiffer, metal alternative to stock components; check fit during installation and verify screw lengths match your axle assembly before final torque.