TRAXXAS TRX4 Aftermarket Servo Horn Aluminium Spring TRX4025T/S/3 by GPM  [TRX4025T/S/3]

Aluminium servo horn built for TRX4 diff lock use

This aluminium servo horn set fits the locking differential interface on Traxxas TRX4 trail crawlers. Machined from aluminum 6061 T6, the horns include a built-in spring to absorb impacts and lower shock transfer into the servo when the diff engages.

The component acts as a compliant coupling between the servo and the diff lock linkage, helping the servo maintain position without changing vehicle driveline response. The spring provides a buffer that can prevent abrupt torque spikes reaching the servo output.

Assembly advice: use the supplied 3*10 stainless round head screws with the aluminium collars, and fit a 3mm metal washer under each screw head to reduce axial clearance. Tighten to recommended torque and use thread lock where needed for a reliable fit.

Designed as a direct replacement interface for TRX4 diff lock setups, this spring-loaded aluminium horn helps preserve servo longevity while keeping weight and profile low.