TRX-4 Compatible 25T Servo Arm Aluminum Spring TRX4025TA/2H by GPM  [TRX4025TA/2H]

Metal 25T servo arm made for TRX-4 crawlers

Designed for Trail Crawler configurations built on TRX4 platforms, this 25T alloy servo arm replaces plastic stock arms to give a stiffer, more durable steering connection. An internal compression spring cushions shocks to the steering link, helping to protect the servo gears without altering the spline interface.

The package contains the essential metal parts for a direct-fit upgrade: the aluminum 25T spline horn, two 3x12 stainless round head screws, an aluminum collar and a single 3mm washer. These parts are intended for hobby-grade installation; confirm compatibility with your servo spline and shaft before completing assembly.

Fitment note for TRX-4 chassis: the spring adds thickness to the horn body compared with standard plastic arms. When installed in the stock servo spot, reverse the support tie-rod orientation so the horn clears nearby chassis components. This does not change the front reverse steering gearbox location but prevents contact in some stock layouts.