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Restore Rear Axle Control On Heavy Duty Trucks
The factory lower trailing arm on the Ram 2500 uses soft rubber bushings that compress under heavy payloads and towing, allowing the rear axle to shift and reducing overall stability. This Whiteline KTA389 lower trailing arm assembly replaces the factory arm with a stronger design that keeps the axle located precisely, restoring confident handling when the truck is loaded.
Key Features
- Direct replacement lower trailing arm assembly for the Ram 2500
- Reduces axle shift under heavy payload and towing
- Improves rear end stability and handling confidence
- Built stronger than the factory stamped steel arm
- KTA389 uses the factory mounting points for a direct fit
Fitment
| Year Range | Make | Model |
|---|---|---|
| 2009-2024 | Ram | 2500 |
Specifications
| Detail | Value |
|---|---|
| Manufacturer | Whiteline |
| MPN | KTA389 |
| Position | Rear Lower Trailing Arm |
| Part Type | Control Arm Assembly |
What's Included
- 1 lower trailing arm assembly with bushings
About Whiteline
Whiteline builds heavy duty replacement suspension arms designed to outperform factory stamped steel components. Their trailing arm assemblies keep the rear axle located precisely under demanding load conditions.
FAQ
What is the KTA389?The KTA389 is a Whiteline lower trailing arm assembly for the Ram 2500 built to reduce axle shift under heavy payloads.
Why does my Ram 2500 feel unstable when loaded?The factory rubber bushings in the lower trailing arm compress under heavy payload, allowing the rear axle to shift and reducing stability.
Will this improve stability when towing or hauling?Yes, this arm assembly keeps the rear axle located precisely, which improves stability under load.
Is this a direct bolt in replacement?Yes, this arm assembly uses the factory mounting points for a direct bolt in installation.
Does this include new bushings?Yes, the KTA389 is a complete assembly that includes new bushings, not a bushing only kit.
Will this work on a lifted Ram 2500?Yes, this trailing arm assembly is compatible with lifted and stock ride height applications.
Do I need an alignment after installing this arm?Yes, a rear alignment check is recommended after replacing any trailing arm component.
Will this help reduce rear end noise from worn bushings?Yes, replacing worn factory bushings with the firmer Whiteline bushings in the KTA389 typically reduces noise from bushing play.
Install Instructions
- Raise and safely support the rear of the truck on jack stands
- Support the rear axle and remove the factory lower trailing arm mounting bolts
- Remove the factory lower trailing arm
- Install the Whiteline lower trailing arm assembly and torque all fasteners to factory specification
- Lower the truck and check rear axle alignment
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