This RC-scale center gear box is supplied under part number JR-TRX423-BK, finished in black and machined from aluminum as stated in the product name. It is intended for use on Traxxas TRX-4 scale and trail crawler platforms where the center driveline housing is replaced for maintenance or chassis tuning purposes.
The component's role is mechanical: it houses the center gearset and provides the mounting interface between the transmission output and the front/rear driveshafts on the TRX-4 platform. When planning an upgrade or repair, verify fitment to the vehicle's chassis and driveshaft geometry before final assembly, and use appropriate torque values for fasteners to avoid thread damage.
Installation notes: remove the original plastic center housing and transfer any internal gears or spacers that your build requires, keep gear lash within recommended tolerance for your TRX-4 gearset, and confirm shaft alignment after assembly. This part is sold as an RC accessory component and is intended for hobby vehicle use only.
Use this aluminum center gear box to replace or upgrade the TRX-4 central driveline housing when you need a metal alternative for assembly or routine maintenance, keeping in mind proper alignment and gear setup for reliable operation.
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