The JR-TRX404-BK is an aluminum T-Lock 2-speed servo mount built for Traxxas TRX-4 chassis. Supplied in black, it is aimed at scale and trail crawler builds that need a compact metal mount to secure T-Lock or 2-speed servo setups while keeping clearance low and strength high.
Fitting typically replaces the stock plastic footprint with this aluminum unit, lining it up with the TRX-4 servo bay and fastening with the vehicle's original chassis screws where possible. Always re-check linkage geometry and horn clearance during the final adjustment stage.
From a durability standpoint JR-TRX404-BK gives a firmer mounting surface to limit flex under torque, which can stabilise actuation for lockable transfer cases and when running beefier servos. Consider it a rugged, scale-focused hop-up rather than a way to change servo sizing.
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