This center gear box is supplied as part number JR-TRX423-BK, delivered in a black anodized look and manufactured from aluminum as noted. It suits Traxxas TRX-4 scale and trail crawler platforms where the metal housing replaces the stock plastic center assembly for service or custom builds.
Its purpose is to contain the center gearset and serve as the mounting interface between the transmission output and both front and rear driveshafts specific to the TRX-4 layout. Prior to fitting, confirm chassis clearances and driveshaft orientation and follow recommended fastener torque to prevent thread damage.
Fitting tips: remove the stock housing, transfer any internal components that your setup needs, keep gear backlash within advised tolerances for TRX-4 gearsets, and ensure shaft alignment once assembled. This product is sold as an aftermarket hobby component.
Choose this aluminum center gear box JR-TRX423-BK to replace the TRX-4 central housing when a metal option is required, taking care with alignment and correct gear setup for dependable operation.
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