• 2 FMI billet aluminum rear upper arms, with spacers and hardware
• 1" FK uniballs
• Custom machined 17-4 stainless steel spacers, designed to fit the stock mount locations
• Urethane wobble stopper at the front mounts
• Aluminum ball post for the suspension travel sensor

The rear upper trailing arms control axle wrap and hold pinion angle. When they mount through rubber, the axle can rotate and shift as load changes.

A billet arm on uniball joints gives the axle a defined pivot instead of a soft one. The 17-4 stainless spacers locate each uniball in the stock mounts, and the urethane wobble stopper at the front keeps the arm aligned in its mount.

The upper arm also carries the suspension travel sensor. The aluminum ball post keeps that sensor mounted, so the truck still works correctly.

Fits the Ram TRX, model years 2021, 2022, 2023, 2024 and 2027, in the stock rear upper arm mount locations. The rear upper arms are the same part on both TRX generations; Ram did not build a TRX for 2025 or 2026.

Choose black anodized, FOX orange anodized, blue anodized or raw billet aluminum.

Will the suspension travel sensor still work?

Yes. The upper arm has an aluminum ball post for the suspension travel sensor, so the truck works correctly.

What joints do these arms use?

1" FK uniballs, located by custom machined 17-4 stainless steel spacers.

Do they fit the stock mounts?

Yes. The spacers are designed to fit the stock mount locations.

What is the wobble stopper?

A urethane piece at the front mounts that keeps the arms in alignment.

What finishes are available?

Black anodized, FOX orange anodized, blue anodized or raw billet aluminum.