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2pc Kit

Adjustable control arms — rear upper · fits 0"–6"+ lift

Jeep Gladiator JT 20+ 2pc Crawl Series Rear Upper Adjustable Control Arms

415.76 415.76 USD 472.45

472.45

Build Season · Save 12% — $57 off · ends Aug 28

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Order today — ships within 1–3 business 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 Expert Support 100K+ Community
Free mounting hardware included — a $20 value
1
Joints Johnny Joints both ends
Tubing 1.75" OD lowers / 1.50" OD uppers 5/16" wall DOM
https://jerdev.core4x4.com/web/image/product.template/2172/image_1920?unique=df113cf

2pc Kit

Jeep Gladiator JT 20+ 2pc Crawl Series Rear Upper Adjustable Control Arms

Adjustable control arms — rear upper · fits 0"–6"+ lift

SKU: CRL-J-JT-RU2
Does not fit Chevrolet Avalanche 1500

415.76 415.76 USD 472.45

472.45

Build Season · Save 12% — $57 off · ends Aug 28

More ways to pay ▾

COLOR 11 colors
Black Blue Charcoal Green LightGreen Orange Purple Red White Yellow Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed.

Build Your Kit

  • Vehicle
    Confirm this matches your vehicle. Use Shop by Vehicle to filter correctly.
  • Brand
  • Color
    Powder coat color for control arms and track bars. Does not affect performance.
  • Series
    Cruise: daily driving and light off-road. Camp: overlanding. Crawl: aggressive rock crawling.
  • Hardware
    Choose upgraded hardware if your factory hardware is worn, damaged, or missing.
  • Lift Size
    Choose your current front lift height. Measure from center of wheel to fender if unsure.
  • Note to Core4x4:

Select Color to see price and add to cart.

Free mounting hardware included — a $20 value
Order today — ships within 1–3 business 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

Alignment recommended Lifetime warranty on all non-wear items Made In USA

Made in USA Orem, Utah
Lifetime Guarantee Unconditional
10 Colors In-house powder coat
Fully Adjustable 0-6" of lift
3 X-Series Options Only Core 4x4

Product Details

Superior Off-Road Performance

Take your Jeep Gladiator JT’s suspension to the next level with our Crawl Series Rear Upper Control Arms. Specifically designed for model years 2020-Present, these control arms are built to deliver exceptional off-road flexibility, improved axle control, and enhanced on-road comfort for an unparalleled driving experience.

Key Features and Benefits

  • Enhanced Off-Road Flexibility – Equipped with Johnny Joints at both ends, these control arms provide superior articulation, improving your vehicle's ability to tackle uneven terrain while maintaining road comfort.
  • Adjustability for Pinion and Axle Control – Designed to accommodate lifts from 0 to 6 inches, these control arms allow for precise pinion angle adjustments and help re-center your rear axle when paired with our adjustable lower control arms.
  • High-Strength Construction – Crafted from 1.75″ OD DOM Tubing with a 5/16” wall thickness, these control arms exceed industry standards for strength and durability, making them resilient in the harshest environments.
  • Optimized Rear-End Solution – For the most complete rear-end upgrade, pair these upper control arms with the Crawl Series Rear Lower Control Arms and Rear Track Bar to achieve optimal suspension geometry and stability.

Unmatched Adjustability for Rear-End Control

Our Crawl Series Rear Upper Control Arms provide unmatched control over your suspension setup. With left- and right-hand threading for easy adjustments while installed, these arms simplify the process of dialing in your rear axle's alignment and pinion angle. Whether you’re fine-tuning for a smoother ride or adjusting for off-road challenges, these control arms deliver precision and performance.

Two-Stage Powder Coating for Superior Protection

To ensure long-lasting durability and corrosion resistance, these control arms undergo a rigorous two-stage powder coating process. Zinc primer base coat – Provides advanced protection against rust and environmental elements. Durable top coat – Available in 10 custom color options to add a personalized finish that matches your Jeep’s style.

Made in the USA

Proudly manufactured in Orem, UT, our Crawl Series products reflect the highest standards of American craftsmanship. By sourcing materials locally and maintaining rigorous quality control, we ensure that each component offers reliable performance and long-term durability.

Optional Hardware Upgrade

Designed for straightforward installation with factory hardware, these control arms make upgrading your suspension system simple and efficient. Optional Grade 8 hardware kits are available separately for tackling rusted or stubborn bolts with ease.

 

  • Vehicle Fitment: Jeep Gladiator JT 20+ – Improve suspension flexibility, rear axle control, and on-road comfort with premium rear upper control arms designed for precision alignment and durability in extreme off-road conditions.

  • CORE Advantage: Enhance rear suspension performance with fully adjustable control arms that correct pinion angle, re-center the rear axle, and maximize articulation for smoother handling on rough terrain and daily driving.

  • Adjustability: Engineered for lift heights from 0 to 6 inches, these control arms allow precise tuning of axle alignment and pinion angle. Left- and right-hand threads enable quick adjustments without removal for hassle-free fine-tuning.

  • Construction: Built from 1.75” OD 5/16” wall DOM tubing, these heavy-duty control arms feature Johnny Joints at both ends, delivering unmatched strength, articulation, and longevity for the toughest off-road challenges.

  • 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, our product includes a lifetime warranty on all non-wear items, providing you with confidence and peace of mind in your purchase.

Built With

Rear Upper control arms built with 1.75” OD 5/16” Wall DOM. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.625” long threads.

Make Model Submodel Years
Jeep Gladiator 2020 - Present

Each rebuild kit includes all necessary components to replace and restore wearable parts.

Construction & Materials

Rear Upper control arms built with 1.75” OD 5/16” Wall DOM. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.625” long threads.

Vehicle Jeep Gladiator JT (20–Present)
Brand CORE 4X4
Color Black or Blue or Charcoal or Green or LightGreen or Orange or Purple or Red or White or Yellow or Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed.
Series Crawl Series
Hardware No Hardware or Complete Kit
Lift Size 0" — 6" or 6"+
Placement on Vehicle Rear Upper, Rear
Mounting Style Bolt-On

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, lift height, and any add-on options, then add to cart. 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.

Google

Reviews of Core 4x4

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4.8
161 reviews
5
97%
4
2%
3
0%
2
1%
1
0%
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!
GH
Gary Haag Aug 25, 2025
Google
Ordered a set of Core 4x4 control arms for my 2006 Jeep TJ. These are some heavy duty quality control arms. Can't wait to get them installed. Great customer service too!
RH
Roger Hooks Jun 26, 2025
Google
2018 Ram 2500 Rear Control Arms and Rear track Bar been running for about a year, Great Solid Products and great one on one customer service, same day response with issue resolved! Thanks Korby!
JT
jacob trice Apr 27, 2025
Google
Core 4x4 has outstanding products at a fair price and unmatched customer service. When you call Korby, it's like talking with a friend. Very cool and helpul! I ordered some custom control arms, but from the wrong product line and they were super cool about returning them and upgrading to a better "Crawl" series. Only charged the difference between the two products. They paid all the return shipping and sent the uprgaded arms super quick. It was only a couple days. Awesome!! I couldn't be happier with the transaction👍🏼 Also, these control arms are stout and take a beating. I run heck out my Jeep in the rocks and desert. No problems whatsoever. Thanks Core 4x4, ya'll are welcome at my campfire anytime! Jake T. Pleasant Hill, Or.
OA
Owen Adams Sep 24, 2025
Google
These guys are awesome I messed up my address on my order somehow and they were so so helpful Korby was right there every step to a solution very communicative and respectful I will definitely be ordering parts with them in the future!
AP
Ajay Paynter Mar 4, 2026
Google
Great company, who worked with me on shipping parts to arrive in time for a show. When I explained my concern they went above and beyond to make it happen. Quality of the parts is top notch.
GK
GLENN KOSZKA Apr 27, 2025
Google
The folks at Core 4X4 are always wonderful to deal with. They explain your options and never pressure or rush things. The quality of the Core Control Arms is top shelf, especially if your goal is to stop wheel hop. I recommend Core 4x4 without reservation ! ! !
OJ
Oldgreg jr Mar 23, 2025
Google
Good company, they offer well built parts and Great customer service. I had a couple of hang ups with my control arms that I purchased, they were very easy to work with and found the solution to make them work.
RM
R2d2 Movi78 Feb 21, 2026
Google
I’m extremely impressed with Core 4x4. The quality of their parts is outstanding — everything feels solid, well‑built, and engineered with real attention to detail. Shipping was fast and everything arrived perfectly packaged. Their customer service is just as good as their products: responsive, helpful, and genuinely committed to making sure you get exactly what you need. Overall, a top‑tier experience. I’ll definitely be buying from them again. Specially thank you Mr. Linscomb from Core 4x4. Arturo M.
JJ
Jason Jukich Jul 26, 2025
Google
Fast shipping, excellent communication, and awesome products
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Chevrolet Avalanche 1500
2002 - 2006 · 21 parts
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Made in Orem, UT · Lifetime warranty
(801) 850-2920
Chevrolet Avalanche 1500
2002 - 2006
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