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763.05 763.05 USD 897.70

897.70

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

SKU: CRL-J-JL-RS4
Fits: 2018 - Present Jeep Wrangler JL / JLU Add vehicle

763.05 763.05 USD 897.70

897.70

Starting at $110/mo or 0% APR with . See if you qualify

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.

4–8 hr install Moderate Alignment recommended Lifetime warranty on all non-wear items Made In USA

Transform Your Jeep’s Rear Suspension

Upgrade your Jeep Wrangler JL with the Crawl Series Rear Control Arms Set, the ultimate solution for superior off-road flexibility and on-road performance. Designed to accommodate Jeep models from 2018 to present, this set includes two rear upper control arms (CRL-J-JL-RU2) and two rear lower control arms (CRL-J-JL-RL2). With heavy-duty construction and advanced adjustability, these control arms ensure your rear axle stays centered and aligned, even under the most demanding conditions.

What's Included

  • Crawl Series Rear Upper Control Arms (CRL-J-JL-RU2)
  • Crawl Series Rear Lower Control Arms (CRL-J-JL-RL2)

Key Features and Benefits

  • Built for Extreme Durability – The upper control arms feature 1.5” OD x 5/16” DOM Tubing, while the lower control arms are constructed from 1.75” OD x 5/16” DOM Tubing, offering unmatched strength and resilience for off-road and on-road applications.
  • Precision Suspension Geometry – Fully adjustable to accommodate lifts from 0 to 6 inches, these control arms enable precise alignment correction, axle centering in the wheel well, and optimal pinion angle adjustment.
  • Enhanced Articulation with Johnny Joints – Original RockJock Johnny Joints at both ends of each arm provide unparalleled articulation and flexibility, ensuring smooth suspension movement over rugged terrain.
  • Complete Suspension Solution – Pairing this set with our Crawl Series Front Control Arms creates a full suspension upgrade, providing comprehensive control and stability across all terrains.

Durable Two-Stage Powder Coating

Each control arm is treated with a rigorous two-stage powder coating process. A zinc primer base ensures excellent corrosion resistance. The durable top coat, available in 10 customizable colors, adds a layer of protection and style.

Proudly Made in the USA

Manufactured in Orem, UT, the Crawl Series Rear Control Arms Set reflects CORE 4X4’s commitment to exceptional quality and American craftsmanship. By handling the production process in-house, we ensure top-tier products that support local industries.

Straightforward Installation

  • Designed for an optional hardware upgrade process, these control arms use factory hardware for a seamless fit.
  • Optional Grade 8 hardware kits are available separately for dealing with rusted or stubborn bolts.

In Conclusion

The Crawl Series Rear Control Arms Set (CRL-J-JL-RS4) delivers the ultimate combination of durability, adjustability, and flexibility for your Jeep Wrangler JL. By upgrading your suspension with this set, you’ll enjoy improved stability, precise axle alignment, and the confidence to conquer any trail. Pair with other Crawl Series components for a complete suspension overhaul and elevate your off-road adventures to the next level.


Make Model Submodel Years
Jeep Wrangler 2018 - Present

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

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"+

See It Installed

Install videos and build guides on our YouTube channel.

Watch more installs on YouTube
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Reviews from Google

See all on Google
5.0
132 reviews
5
97%
4
2%
3
0%
2
1%
1
0%
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.
RC
Ryan Colligan Mar 4, 2026
Google
I have nothing but good things to say about Core 4x4. I have the crawler series on my JKU and we take it all over the place. These parts handle everything we throw at them.
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.
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!
OK
oleg k Nov 23, 2025
Google
I recently ordered a set of control arms from Core 4x4, and the entire experience was absolutely top-notch from start to finish. The ordering process was smooth, the parts arrived quickly, and the control arms themselves are extremely high quality—solid construction, great finish, and clearly built to last. I also want to give a special shout-out to Korby, the guy I spoke with during the process. His customer service was amazing. He went above and beyond to make sure I got exactly what I needed, answered all my questions, and made the whole experience stress-free. You don’t see service like that very often these days. If you’re looking for high-quality suspension components backed by truly exceptional customer service, I highly recommend Core 4x4. I’ll definitely be buying from them again.
PM
Paul Melancon Aug 25, 2025
Google
Ordered a control arm and track bar kit for my WJ from Core 4x4 on Monday 7/28 and received it today, Friday 8/1. Im not a state or two away, im in CT aka the other side of the country. Communication is phenominal, emails were responded too in an hour or less. Parts arrived well packed, not damaged, and are great quality for my needs. There arent many companies left that service customers as well as Core 4x4 and i wont hesitate to check them out again if i need something else. Well done!
JL
John Luna Nov 23, 2025
Google
Great team, and help to support my jeep and provide best stuffs
DN
Devan Nelson Mar 25, 2019
Google
Had a great experience with Core 4x4, I desperately needed a custom track bar and found out just a couple days before Easter Jeep Safari. Spence was a huge help and made it happen with plenty of time to spare. Their parts are top notch!
CM
Craig MacIver May 27, 2025
Google
Got the CAMP version of adjustable control arms and track bars for our 03 TJ with a 3” lift and 33x10.5 KO 2’s. Super beefy bars, great fit and adjustability. Friendly advice and support from Korby at CORE 4X4. Good follow up as well. The ride quality is great as well as the handling. I think it all looks pretty good as well.
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