GPM Racing Aluminium 6061-T6 Servo Horn W. Built-in Spring (For Locking Diff) for Traxxas 1/10 TRX4 (TRX4025TSN/3)

Precision aluminium horn with spring for lock-diff servos

Engineered for TRAXXAS TRX4 lock-differential servo areas and compatible TRX6 variants, this TRX4025TSN/3 servo horn is machined from 6061-T6 aluminium for a controlled strength-to-weight balance. The integrated spring element provides controlled compliance to mitigate peak shock loads on the servo output during rapid lock or unlock events.

Technical fitment note: the hardware pack contains stainless round head screws and aluminium collars. To remove axial clearance between screw head and collar, position the supplied 3mm metal washer beneath each round head screw prior to final assembly. Proper washer placement improves coupling stiffness and reduces micro-movement at the servo-to-linkage interface.

Packing includes

• Servo horn – 3pcs
• Stainless steel round head screws 3*10 – 3pcs
• Aluminium collar – 3pcs
• 3mm Metal washer – 3pcs

Original Name / Part No:

5669

Compatible Models

• TRAXXAS-1/10 ELECTRIC 4WD TRX4 DEFENDER TRAIL CRAWLER -82056-4
• TRAXXAS-1/10 6WD TRX-6 MERCEDES-BENZ G-63 MAG 6X6-88096-4

For hobbyists seeking a precision, impact-tolerant upgrade to the diff-lock servo area, this 6061-T6 aluminium horn with integrated spring offers improved load management and repeatable engagement when installed with the supplied washers.

What are the key benefits of the spring design?

The spring allows limited angular compliance, absorbing transient shocks and lowering peak torque transmitted to the servo, which improves longevity under repeated lock/unlock cycles.

Is the part a direct replacement for stock plastic horns?

Yes, the horn is intended as an aftermarket direct-fit for the TRX4 lock-diff servo area, but users should confirm mounting dimensions and servo spline compatibility before installation.

Recommended installation practice?

Use the supplied stainless screws and collars, place the 3mm metal washer under each screw head to remove play, and torque screws to a controlled value to avoid stripping the collar bore.

Material considerations for 6061-T6?

6061-T6 offers a combination of machinability, tensile strength, and corrosion resistance suitable for scale aluminium parts where weight and impact resistance must be balanced. Write Product Review Please sign in your account before you can write any review. Sign In Close

Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.