TRAXXAS TRX4 Trail Crawler Aluminum 6061-T6 Servo Horn with Built-in Spring by GPM TRX4025TSN/3  [TRX4025TSN/3]

Aluminum servo horn with spring for TRX4

This is an aftermarket RC-scale servo horn made for TRAXXAS TRX4 platforms, produced by GPM as TRX4025TSN/3. Machined from 6061-T6 aluminum, the part includes a built-in spring to help absorb shocks and limit impact transferred to the servo when operating a locking differential. It is intended specifically for lock-differential servo areas on TRX4-style crawlers and compatible TRX6 variants.

Installation note: the kit supplies stainless round head screws and alloy collars; place the supplied 3mm metal washer under each round head screw to remove excess gap between the screw head and the collar. This reduces play and secures the coupling between the servo output and the diff-lock mechanism. The replacement kit is a direct accessory for scale servos and associated linkage in RC crawling setups.

For TRX4 owners needing a lightweight, impact-tolerant replacement for diff-lock servo areas, this 6061-T6 aluminum horn with integrated spring provides a direct-fit aftermarket option; follow the washer placement recommendation to ensure secure engagement.