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.
What's Included
- Crawl Series Rear Upper Control Arms (CRL-J-JL-RU2)
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.
In Conclusion
The Crawl Series Rear Upper Control Arms (CRL-J-JL-RU2) deliver superior durability, adjustability, and articulation for Jeep Wrangler JL owners. Whether fine-tuning a lifted vehicle or enhancing off-road performance, these control arms provide the flexibility and control your suspension needs. For the ultimate rear-end setup, pair with Crawl Series Rear Lower Control Arms and unlock your Jeep’s full potential. Upgrade today and conquer any terrain with confidence!
Ideal use:
Crawl Series is for aggressive rock crawling and hard use. Maximum strength and articulation for serious off-road enthusiasts.
Not sure which series fits your needs? Contact us for guidance.
- Alignment recommended after install.
- Install difficulty: moderate. Basic mechanical skills recommended.
- Estimated install time: 4–8 hours depending on experience.
- Some trimming may be required on factory axle mounts (front track bar). See our YouTube channel for guidance.
- Install videos and support available. Check product Description for links.
- Designed to reuse factory hardware. Upgrade available if yours is worn or missing.
| 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
Reviews from Google
Not Sure Which Tier? Compare All Three.
Same American steel. Same warranty. Same quality. Choose by how you use your vehicle.
| CRUISE | CAMP | CRAWL VIEWING | |
|---|---|---|---|
| Tagline | "Daily Confidence" | "Weekend Ready" | "Trail Domination" |
| Joint Type | Polyurethane Bushings | Johnny Joint (Single) | Double Johnny Joint |
| Articulation | ~30% | ~65% | ~95% |
| Tubing | 1.625" OD / 3/16" Wall DOM | 1.75" OD / 5/16" Wall DOM | 1.75" OD / 5/16" Wall DOM |
| Price | $214 | $302 | $439 |
| Maintenance | Zero | Periodic grease | Periodic grease |
| Best For | Daily driver, light trails | Weekend warrior, moderate off-road | Hardcore builder, competition |
| Warranty | Lifetime ✓ | Lifetime ✓ | Lifetime ✓ |
Why Builders Choose Core 4x4
The only aftermarket suspension brand with a tiered product system
vs. MetalCloak
One price point, no tier options. Core 4x4 Crawl matches their performance at a better price with a better warranty.
vs. Teraflex
Skip a grease interval? Warranty voided. Core 4x4 Cruise requires zero maintenance — and our warranty covers everything.
vs. Clayton / Budget
Cheaper arms exist. But adjustable, American-made, 10 colors, lifetime guarantee, and an upgrade path? Only Core 4x4.
Accessories & Add-ons
Jeep Wrangler JL / JLU 18+ 8pc Crawl Series Adjustable Control Arm Kit
$ 1,585.45
Jeep Wrangler JL / JLU 18+ 10pc Crawl Series Adjustable Control Arm, Track Bar Kit
$ 2,047.45
Jeep Wrangler JL / JLU 18+ 12pc Crawl Series Adjustable Control Arm, Track Bar, Steering Kit
$ 3,202.45
Jeep Wrangler JL / JLU 18+ 16pc Crawl Series Adjustable Control Arm, Track Bar, Steering, End Link Kit
$ 3,727.45
Jeep Wrangler JL / JLU 18+ 2pc Crawl Series Rear Lower Adjustable Control Arms
$ 482.95
Jeep Wrangler JL / JLU 18+ 4pc Crawl Series Rear Adjustable Control Arm Kit
$ 897.70
