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SKU: R-TRX-2021-AL-RU2

2pc Rear Upper Adjustable Control Arms

Ram TRX 21-24 2pc Rear Upper Adjustable Control Arms
$923.96 $1,049.95 Save $126

$ 923.96 923.96 USD $ 1,049.95

$ 1,049.95

Save $ 125.99

Built to order, usually ships in 1–3 days.
Enter ZIP for arrival estimate Delivery date by ZIP
Order by 3:00 PM MT today — we'll start tomorrow
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COLOR Pick yours
100% bolt-on, no welding Made in USA · Orem, Utah You break it, we replace it Joints you rebuild instead of replace
Talk to an Expert: 385-375-2104 ADD TO CART →
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2pc Rear Upper Adjustable Control Arms

Ram TRX 21-24 2pc Rear Upper Adjustable Control Arms
SKU: R-TRX-2021-AL-RU2
Will this fit your rig?

COLOR Pick yours

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$ 923.96 923.96 USD $ 1,049.95

$ 1,049.95

Save $ 125.99

Select Color to see price and add to cart.

100% bolt-on, no welding Made in USA · Orem, Utah You break it, we replace it Joints you rebuild instead of replace
Talk to an Expert: 385-375-2104
Built to order, usually ships in 1–3 days.
Enter ZIP for arrival estimate Delivery date by ZIP
Order by 3:00 PM MT today — we'll start tomorrow
See full timeline
Core 4x4 Manufactured Social 15 Promo Eligible

Alignment recommended You break it, we replace it. Made In USA

Made in USA Orem, Utah
You break it, we replace it Warranty on non-wear items
10 Colors In-house powder coat
Fully Adjustable 0-6" of lift
3 X-Series Options Only Core 4x4

Product Details

Make Model Submodel Years
Dodge/Ram TRX 2021–2024

  • Vehicle Fitment: RAM TRX 21+ – Elevate your TRX's off-road capabilities with these high-performance rear upper control arms, providing unmatched strength, stability, and precision handling for the toughest terrains and high-speed desert racing.

  • CORE Advantage: Crafted from 7075 aluminum, these control arms deliver unparalleled strength, superior axle alignment, and improved suspension articulation. Designed to maintain performance under extreme off-road demands, they enhance handling while reducing stress on other suspension components.

  • Adjustability: Featuring left- and right-hand threaded adjusters, these control arms allow for precise axle centering and pinion angle correction on the fly, ensuring your suspension stays perfectly tuned for heavy off-roading or towing.

  • Construction: Built with 2.5” OD 7075 aluminum and 3.0” Rock Jock Johnny Joints, these control arms offer superior durability and flexibility. A two-stage powder coating process ensures long-lasting protection against corrosion, all while maintaining a premium, customizable finish.

  • Two-Stage Powder Coating: Zinc primer base and top coat available in 10 vibrant colors protect against corrosion and allow for personalized styling of your rig.

  • Warranty and Origin: Proudly manufactured in the United States. You break it, we replace it.

Built With

Rear Upper control arms built with 2.5” 7075 Aluminum. Forged Johnny Joints used on both adjustable ends with 1.5” x 12 TPI - 3.67” long threads.

Construction & Materials

Rear Upper control arms built with 2.5” 7075 Aluminum. Forged Johnny Joints used on both adjustable ends with 1.5” x 12 TPI - 3.67” long threads.

Vehicle Ram TRX (21–24)
Brand CORE 4X4
Color Black or Blue or Charcoal or Green or LightGreen or Orange or Purple or Red or White or Yellow or Raw Aluminum or Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed.
Placement on Vehicle Rear Upper, Rear
Mounting Style Bolt-On

Unmatched Strength, Stability, and Adjustability

Elevate your 2021-Present RAM TRX’s performance with the CORE 4X4 7075 Aluminum Rear Upper Control Arms (R-TRX-2021-AL-RU2)—a premium suspension upgrade crafted for the ultimate off-road experience. Built to dominate high-speed desert racing, rocky trails, and anything else you can throw at it, these arms add precision handling, superior strength, and perfect axle alignment to an already formidable truck. If you’re looking for an elite component that matches the TRX’s unmatched prowess, these rear upper control arms deliver the goods.

Key Features and Benefits

  • Heavy-Duty 7075 Aluminum Construction – Fabricated from 2.5” OD 7075 aluminum for maximum strength, corrosion resistance, and weight savings over traditional steel.
  • Massive 3.0” Rock Jock Johnny Joints – Built with fully greaseable, rebuildable 1.5” threaded joints for unparalleled durability, flexibility, and articulation in punishing off-road conditions.
  • On-Vehicle Adjustability for Precision Alignment – Left-hand and right-hand threaded adjusters enable quick fine-tuning of axle position and pinion angles without arm removal.
  • Engineered for Extreme Off-Road Desert Racing – Delivers superior tracking, reduced tire wear, and remarkable ride quality under the most intense, high-speed performance demands.

Recommended Pairing

For a fully optimized rear suspension setup, pair these upper arms with the CORE 4X4 7075 Aluminum Rear Lower Control Arms (R-TRX-2021-AL-RL2) to maximize stability and control.

Performance-Driven Engineering for Maximum Control

Our 7075 aluminum rear upper control arms are expertly designed to correct factory shortcomings, improve traction, and handle extreme load demands. These arms provide smoother suspension travel and minimize stress on bushings and mounts. They offer on-the-fly adjustability for perfect pinion angles and axle centering while delivering unmatched resilience in high-speed desert runs, crawling over challenging terrains, or towing heavy loads. This isn’t just an upgrade—it’s the definitive step toward unlocking your RAM TRX’s off-road supremacy and preserving long-term reliability.

Two-Stage Powder Coating for Maximum Durability

To protect against corrosion and harsh environmental conditions, each aluminum component undergoes a rigorous two-stage powder coating process. Each part receives a zinc primer base coat to ensure lasting rust protection, followed by a top coat available in 10 colors so you can match your truck’s aesthetic and maintain a premium finish.

Proudly Made in the USA

Manufactured in Orem, UT, our CORE 4X4 7075 Aluminum Rear Upper Control Arms use American-sourced materials and meet strict quality standards. By supporting American-made products, you invest in top-tier craftsmanship and dependable performance.

Equip your RAM TRX with these upper control arms and unleash its full potential—because your truck deserves only the best.

 

Use the vehicle selector on our website to shop by your year, make, and model. On product pages, use the kit builder to select your color, series, and any add-on options, then add to cart — you’ll confirm your lift height at checkout. If you need help, call or email our team.

Standard orders typically ship within 1–3 business days of ordering. Custom color orders take approximately 5–10 business days. Because everything is built in-house, we can turn orders quickly even for custom specifications.

You can reach our team through the contact form on our website, or browse to the Contact Us page. Our team is available to answer pre-sale and technical questions before and after your purchase.

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Store reviews on Google

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5.0
★ ★ ★ ★ ★
132 reviews
5 ★
97%
4 ★
2%
3 ★
0%
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1%
1 ★
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GM
George Mar Sep 24, 2025
★ ★ ★ ★ ★ Google
Great company. Highly satisfied with Core 4x4 customer service. Had some bushings fall apart around 600 miles from home. Called and spoke with Korby Linscomb on Thursday, late in the afternoon. He was able to get my bushings sent across country overnight at a very reasonable rate. Had me up and running by Friday evening with enough time to enjoy the Great Smoky Mountain Jeep Invasion. Thanks Guys!
Review photo 1
8
89Patriot Jan 22, 2026
★ ★ ★ ★ ★ Google
Great company! I have used there products consistently with no complaints with quality you can see and feel. From my experience, their customer service is also amazing. Core 4x4 has no issues standing behind their already amazing products and will quickly and professionally solve issues may they arise. I will continue to be a customer.
S
Sebastian Oct 24, 2025
★ ★ ★ ★ ★ Google
Great products they sell, got a crawl series long arm kit for my xj and it has held up quite nice, they are beefy, and for what ever reason they fail it has a great warranty with a customer service to match, when someone asks what control arm kit to buy I always recommend core 4x4
D
DSI Jul 26, 2025
★ ★ ★ ★ ★ Google
Great products with excellent customer service after the sale
MT
Marcus Torres Jan 15, 2026
★ ★ ★ ★ ★ Google
Best control arms I have installed on any of my builds. After running every major manufacturer, Core 4x4 is on par or better than all the high-end companies at a fraction of the cost. Lifetime warranty is the cherry on top.
PB
Peter Busack May 27, 2025
★ ★ ★ ★ ★ Google
Purchased a set of Trailing arms for my Ram 1500, quality is first class. I bought the ones with the Jonny Joints for more articulation and it appears from the construction I should get a lifetime of use, Zerk fittings are an added plus. Would defiantly recommend, and the the service team answered all of my questions.
DD
Dmitriy D May 27, 2025
★ ★ ★ ★ ★ Google
Installed rear and upper control arms and track bar on my 3rd Gen 4RUNNER to align rear axle and restore factory wheel base after 3.5" lift. Car drives better than New! Improved handling cornering and overall driving. Very solid and high quality made product. Support is outstanding. Shipping extremely fast. Thank you so much. I wish you will have something new for my car.
Review photo 1
CD
Christopher Dami Jun 26, 2025
★ ★ ★ ★ ★ Google
2022 I ordered a 2023 Jeep Wrangler Rubicon in High Velocity yellow. Without any hesitation I knew I was going with Core 4x4’s 16pc Camp series suspension, powder coated in yellow. Compliments were a given from any and everyone that looked under my jeep. So beefy, I may have left some yellow paint on the rocks from Maine to Florida, but no bends or breaks. Customer service has been perfect each and every time I have needed something. Their warranty is top notch! Their communication is also wonderful. Might upgrade to the Crawl Series control arms where the Johnny joints are on both sides. Great all around company and a great team to troubleshoot your issue and come to a conclusion. Nothing bad to say about this company. Just love this suspension.
Review photo 1 Review photo 2 Review photo 3
A
Aaron Mar 23, 2024
★ ★ ★ ★ ★ Google
I have recently come to know Core 4x4 when I purchased a Jeep XJ and was looking for a place that had dedicated XJ suspension and components. Here is what makes them different than most other shops. All of their components are top shelf quality and they back it up if you break any of it. I was able to see their shop when I picked up an order locally and was impressed with their attention to detail and how they assemble and powder coat each part. I had an issue with a shackle and needed the threaded shaft to be shorter. I called in and talked to Kaden and he told me to come by and they would shorten it for me. When I got there, Kaden and Spencer (the owner) met me and talked about options and proceeded to make the right adjustments to fit my XJ. Told me if anything changes in the future and I need additional length, they would take care of me. So what really sets them apart from others is their Customer Service. Try calling in to any other Jeep suspension or part shop and see how they treat you. Been there - done that. Will continue to do business with Core and their team. Getting that kind of service for just a shackle has me thinking I may need to replace my JT components with Core's. Thanks Guys for being helpful good humans!
MG
Morgan Griffith Mar 25, 2018
★ ★ ★ ★ ★ Google
I met a couple of the Core 4x4 guys at the Salt Lake Offroad Expo and decided to try them out after noticing one of my control arm bushings was disintegrated. I called to discuss parts on Thursday and I was leaving for a trip on Saturday. These guys built my control arms and had them ready to be picked up Friday, 24 hours later. The parts seem to be great quality and they charged me nothing extra to have them painted. These guys were extremely helpful and without them my trip probably would have been cancelled. looking forward to testing out the arms on my next trip to Moab.
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Made in Orem, UT · You break it, we replace it.
385-375-2104