Restore Correct Alignment Geometry on Lifted Ram 1500 Trucks
The SuperPro TRC6640 fixed offset front upper control arm set is built for the Ram 1500 DT with a 2 to 4 inch lift. Lifting a truck changes suspension geometry and can push camber and caster out of factory spec, leading to uneven tire wear and vague steering. The TRC6640 uses a fixed offset design with uprated ball joints and SuperPro bushings to bring alignment back into an ideal range. At a 3 inch lift, paired with the OEM lower control arm, this kit delivers -0.5 degrees of camber and +4.0 degrees of caster.
Key Features
- Fixed offset design corrects alignment geometry on 2 to 4 inch lifted Ram 1500 trucks
- Uprated high-articulation ball joints improve durability over factory units
- SuperPro bushings reduce arm movement and deflection
- Delivers -0.5 degrees camber and +4.0 degrees caster at a 3 inch lift with OEM lower control arm
- Maintenance-free SuperPro bushing design
- Designed and developed in Australia with nearly 5 decades of suspension engineering experience
Fitment
| Year Range | Make | Model |
|---|---|---|
| 2019-2023 | Ram | 1500 |
Specifications
| Detail | Value |
|---|---|
| Brand | SuperPro |
| MPN | TRC6640 |
| SKU | SPRTRC6640 |
| UPC | Not published by manufacturer |
| Position | Front, upper control arm set |
| Bushing Material | SuperPro polyurethane |
| Ball Joint | Uprated, high-articulation |
| Recommended Lift Range | 2 inch to 4 inch |
| Warranty | Manufacturer limited warranty against defects |
What’s Included
- 2 x SuperPro TRC6640 fixed offset upper control arms
- Uprated ball joints
- Integrated SuperPro bushings
- Mounting hardware
- Installation instructions
About SuperPro
SuperPro has engineered performance suspension components since 1972, specializing in polyurethane bushings and suspension hardware designed to improve handling, durability, and control while maintaining daily drivability. Their components are developed and tested to meet or exceed OEM performance standards across daily drivers, overland builds, and dedicated off-road rigs.
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FAQ
What is the TRC6640?
This is a SuperPro fixed offset front upper control arm set for the Ram 1500, designed to correct alignment geometry on trucks lifted 2 to 4 inches while upgrading to uprated ball joints and durable bushings.
What alignment numbers does this kit deliver?
At a 3 inch lift, paired with the OEM lower control arm, the TRC6640 delivers -0.5 degrees of camber and +4.0 degrees of caster.
Do I need this kit if my truck is not lifted?
This kit is designed specifically for trucks lifted 2 to 4 inches. On a stock height truck, the fixed offset geometry is not needed.
Does this kit include the lower control arm?
No. This kit includes the front upper control arms only. The stated alignment specs assume it is paired with the OEM lower control arm.
Does the bushing design require maintenance?
No. SuperPro’s bushings are maintenance-free and do not require grease fittings or periodic servicing.
Why do lifted trucks need alignment-correcting control arms?
Raising ride height changes the geometry of the front suspension, which can push camber and caster out of factory spec and cause uneven tire wear or vague steering if not corrected.
Is this a direct bolt-on replacement for the factory control arms?
Yes. It bolts into the factory mounting locations on the Ram 1500 without any drilling, cutting, or fabrication.
Can this be installed with basic hand tools?
Yes. Installation requires common hand tools and a way to safely support the front of the vehicle. An alignment should be performed after installation.
Install Instructions
- Raise and safely support the vehicle by the frame, allowing the front suspension to hang free
- Remove the factory front upper control arms from the frame and knuckle mounting points
- Install the SuperPro TRC6640 fixed offset upper control arms using the supplied hardware
- Torque all hardware to manufacturer specifications
- Lower the vehicle to ride height
- Have a professional alignment performed to confirm camber and caster are within spec
