Jeep Wrangler JL/JLU 18+ 2pc Crawl Series Rear Upper Control Arms

Name: Jeep Wrangler JL / JLU 18+ 2pc Crawl Series Rear Upper Adjustable Control Arms
Brand: CORE 4X4
SKU: CRL-J-JL-RU2
Price: 378.8 USD
Availability: InStock

Control Arm Sets

SKU: CRL-J-JL-RU2 ★★★★★ (132 reviews)

$ 378.80 378.8 USD $ 461.95

$ 461.95

(Save 18%)

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Salt Lake City, UT change

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Lifetime warranty Fitment guarantee Ships from Orem, UT 4–8 hr install

Jeep Wrangler JL / JLU 18+ 2pc Crawl Series Rear Upper Adjustable Control Arms

COLOR 11 colors — pick yours

	Daily Confidence $214	Trail-Ready $295	Trail Domination $378
Articulation	30°	65°	95°
Joint Type	Flex Polyurethane	Forged Johnny Joint	Forged Johnny Joint
Tubing	1.875" OD lowers / 1.625" OD uppers · 3/16" wall DOM	1.75" OD lowers / 1.50" OD uppers · 5/16" wall DOM	1.75" OD lowers / 1.50" OD uppers · 5/16" wall DOM
Maintenance	Periodic greasing	Periodic greasing	Periodic greasing
Warranty	Lifetime	Lifetime	Lifetime
	SELECT CRUISE →	SELECT CAMP →	SELECT CRAWL →

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

Maximize Rear Suspension Performance

Upgrade your Jeep Wrangler JL with the Crawl Series Rear Upper Control Arms, designed to deliver unmatched off-road flexibility and improved on-road drivability. Engineered for Jeep models from 2018 onward, these control arms provide precise pinion angle adjustments and enhanced rear axle alignment, making them an essential upgrade for lifted or performance-oriented vehicles.

Key Features and Benefits

Built for Durability – Constructed from 1.5” OD DOM Tubing with 5/16” wall thickness, these control arms provide superior strength and longevity for extreme off-road and daily driving conditions.
Precision Adjustability – Fully adjustable to accommodate lifts from 0 to 6 inches, enabling fine-tuning of pinion angles and rear axle alignment for improved ride quality and reduced drivetrain stress.
Enhanced Flexibility – Equipped with Rock Jock Johnny Joints at both ends, these arms offer incredible articulation and smooth movement, improving off-road performance while maintaining stability.
A Complete Rear-End Solution – Pair with Crawl Series Rear Lower Control Arms to achieve full suspension geometry corrections, optimal axle centering in the wheel well, and enhanced overall performance.

Two-Stage Powder Coating

Every control arm undergoes a rigorous two-stage powder coating process: Zinc primer base provides maximum corrosion resistance. Top coat available in 10 custom colors offers added protection and a personalized touch.

Proudly Made in the USA

Manufactured in our Orem, UT facility, the Crawl Series Rear Upper Control Arms reflect CORE 4X4’s commitment to top-tier craftsmanship and American quality. By handling production in-house, we maintain strict quality standards and competitive pricing.

Optional Hardware Upgrade

Designed for straightforward installation, these control arms use factory hardware for a hassle-free setup. Optional Grade 8 hardware kits are available separately for dealing with rusted or stubborn bolts.

Vehicle Fitment: Jeep Wrangler JL 18+ – Enhances rear suspension stability, axle alignment, and drivability for lifted and off-road applications.
CORE Advantage: Provides precise pinion angle adjustments to reduce drivetrain stress and improve ride quality for both off-road and daily driving.
Adjustability: Fully adjustable for 0–6” lifts, allowing fine-tuned suspension geometry, axle positioning, and optimized rear-end performance.
Construction: Built from 1.5” OD DOM tubing with a 5/16” wall, featuring Johnny Joints at both ends for maximum flexibility and durability.
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	Wrangler		2018 - Present

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

Master Rebuild kit for CRL-J-JL-RU2 $ 84.00

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 Wrangler JL / JLU (18–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.

Reviews of Core 4x4

See all on Google

5.0

★ ★ ★ ★ ★

132 reviews

5 ★

97%

4 ★

3 ★

2 ★

1 ★

Adam M Sep 24, 2025

★ ★ ★ ★ ★

First time buying from Korby @ Core 4x4 and it’s being nothing short of a great experience. I bought the non adjustable Trail kit for my 5th Gen Ram 1500 with a 2” lift. The welds look great, nice powder coat finish and quality bushing. Had some trouble fitting the grease nipples due to the powder coating but a thread tap would fix that. They fit easily and perform great. I felt the improvement straight away. No more wheel hop on hard acceleration which was my main reason for the purchase. I was missing some smaller bushings needed for the 5th Gen and Korby’s custom service was on point, with responsive emails and mailing out the missing parts straight away. Very happy with their products and customer service. Highly recommended company👌🏽

Norb Pranger Oct 24, 2025

★ ★ ★ ★ ★

Not sure where to start, Products or Service or Warranty. Products: I found Core4x4 through a very respected YouTuber in the Jeeping community. I purchased an entire set of Core4x4 Control Arms three years ago and have beat the daylights out of them and they are still in great condition. Now, I purchased another Jeep, this time for my daughter and bought yet another set of Control Arms because I know that these things can take a beating and stand up to it. I plan on replacing more parts on this TJ and my JL and will continue to buy from Core4x4. Service: This isn't some huge name conglomerate that treats you like you're just another customer. They are quick with responses and will always make things right should something be a problem. Oh and the quickness in which they ship their products is unmatched. I bought these CAs for my TJ on Thursday, I received them on Monday. Most other manufacturers will tell you weeks, they had them to me in 2 shipping days. Warranty: Seriously, a lifetime warranty? Yes please. Nothing more to say. I can't say enough about how great of a company this is. I've even spoken to the owner through email a few years back on some questions that I had. Support small American built businesses. P.S. Core 4x4, feel free to make me an ambassador and send me some swag :) .

Sebastian Oct 24, 2025

★ ★ ★ ★ ★

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

Zen Asher Mar 23, 2025

★ ★ ★ ★ ★

The quality and durability of the arms are the best. They are super heavy duty. And lifetime warranty is crazy

Logan Matejek May 27, 2025

★ ★ ★ ★ ★

The parts are a massive improvement over factory. I accidentally ordered the wrong endlinks and they helped me figure out the correct size and sent me new ones. Definitely an awesome store

William Turton Nov 23, 2025

★ ★ ★ ★ ★

Finally a company with a great product and customer service to match. I changed my order last minute from short arms to long arms. The lift is extremely well built. Korbey was awesome! Highly recommend Core 4x4

Bailey Smith Mar 23, 2025

★ ★ ★ ★ ★

Core 4x4 excels with precision and service and keeps nothing else higher in mind. Everyone I've met at the company is very honest and down to earth, 10/10 would recommend.

Leonard Smith Jan 22, 2026

★ ★ ★ ★ ★

I don’t write reviews often, but Core 4x4 absolutely earned this one. I recently ordered leaf spring mounts and realized after the fact that I messed up my order. Totally my mistake. Instead of giving me the runaround or pointing at a return policy, Core 4x4 emailed me back and forth, worked through exactly what I was doing with my build, and made sure I ended up with the correct parts. That kind of customer service is rare these days — especially in the off-road world where a lot of companies stop caring once the order is placed. The parts themselves are exactly what you hope for: solid, well-made, confidence-inspiring hardware that looks like it belongs under a vehicle that actually gets used. You can tell these are designed by people who understand suspension geometry and real-world abuse, not just CAD screenshots. Mistakes happen — especially on custom or modified builds — and Core 4x4 handled mine like pros. Fast responses, clear communication, and a genuine effort to help me get it right. If you’re on the fence: don’t be. Core 4x4 is the kind of company you want backing your build — the kind that treats customers like fellow enthusiasts, not order numbers.

Cameron Masters Mar 24, 2023

★ ★ ★ ★ ★

Absolutely incredible family owned business. I asked to pick up my order since I’m local and they came in on a weekend to accommodate. Had to make some adjustments to parts and took the time to make sure it was perfect. Parts are incredible quality. If you have a Jeep, do not hesitate to support this local business.

David Rogers Aug 25, 2025

★ ★ ★ ★ ★

Ive had the front adjustable control arm kit in bright green for my 1996 ZJ. Ive had the kit for about a year now and i have to say, im extremely impressed, over 1000 miles off-road and roughly 20,000 miles on the highway. These control arm kits for any vehicle built by core 4x4 are well worth the money, just be aware thereight be some minor scatches or chips from shipping ( but who should care about that if you're beating the crap out of em' they way they were built and designed for)

Accessories & Add-ons

8pc Kit

Jeep Wrangler JL / JLU 18+ 8pc Crawl Series Adjustable Control Arm Kit

$ 1,585.45

10pc Kit

Jeep Wrangler JL / JLU 18+ 10pc Crawl Series Adjustable Control Arm, Track Bar Kit

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12pc Kit

Jeep Wrangler JL / JLU 18+ 12pc Crawl Series Adjustable Control Arm, Track Bar, Steering Kit

$ 3,202.45

16pc Kit

Jeep Wrangler JL / JLU 18+ 16pc Crawl Series Adjustable Control Arm, Track Bar, Steering, End Link Kit

$ 3,727.45

Rear Lower Control Arms

Jeep Wrangler JL / JLU 18+ 2pc Crawl Series Rear Lower Adjustable Control Arms

$ 482.95

Rear Sets

Jeep Wrangler JL / JLU 18+ 4pc Crawl Series Rear Adjustable Control Arm Kit

$ 897.70