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Jeep Grand Cherokee WJ 99-04 Crawl Series Rear Upper A-Arm w/ Bracket

SKU: CRL-J-WJ-AA1
Fits: 1999 - 2004 Jeep Grand Cherokee WJ Add vehicle

352.53 352.53 USD 414.74

414.74

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.
  • Hardware
    Choose upgraded hardware if your factory hardware is worn, damaged, or missing.
  • Series
    Cruise: daily driving and light off-road. Camp: overlanding. Crawl: aggressive rock crawling.
  • 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

Optimized Rear Suspension Control

Upgrade the performance, adjustability, and durability of your Jeep Grand Cherokee WJ (1999-2004) with the Crawl Series Rear Upper Adjustable A-Arm. Designed for lifted Jeeps from 2 to 6 inches, this heavy-duty A-arm delivers precise pinion angle adjustment, enhanced articulation, and unmatched strength for a smoother, more controlled ride both on and off the road.

What's Included?

  • Crawl Series Rear Upper Adjustable A-Arm w/ Bracket (CRL-J-WJ-AA1)

Key Features Benefits

  • Precision Adjustability – Fully adjustable design allows for precise pinion angle correction, reducing vibration and improving drivetrain alignment for optimal performance.
  • Heavy-Duty Construction – Built with 1.25-inch threads and .25-inch wall DOM tubing, ensuring maximum strength and long-term durability for extreme off-road conditions.
  • Advanced Bracket Design – Includes a laser-cut 1/4-inch steel axle bracket with multiple height settings for customized suspension tuning and improved driveline geometry.
  • Superior Articulation Flexibility – Features RockJock Johnny Joints at both ends for bind-free articulation, increased suspension travel, and exceptional durability, far exceeding factory ball joints.

Two-Stage Powder Coating

Every A-Arm undergoes a two-stage powder coating process for superior corrosion resistance and longevity. The zinc primer base coat provides a strong anti-rust barrier, while the durable top coat—available in 10 custom colors—lets you match your build’s style while ensuring maximum protection.

Made in the USA

Proudly manufactured in Orem, UT, the Crawl Series Rear Upper Adjustable A-Arm is a testament to American craftsmanship, designed to outperform and outlast other aftermarket options.

In Conclusion

For lifted Jeep Grand Cherokee WJs, the Crawl Series Rear Upper Adjustable A-Arm is the ultimate solution for axle centering, pinion angle correction, and maximum articulation. Whether you're tackling rugged trails or cruising the highway, this upgrade ensures superior suspension control, durability, and off-road capability. Upgrade today and take your Jeep’s performance to the next level.


Make Model Submodel Years
Jeep Grand Cherokee 1999 - 2004

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

Vehicle Jeep Grand Cherokee WJ (99–04)
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.
Hardware No Hardware or Complete Kit
Series Crawl Series

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.
EC
Eric Cox Jul 26, 2025
Google
Prompt, professional, and courteous service! Quality parts and broad assortment of products to suite your 4x4 needs:)
EL
Eric Labrum May 27, 2025
Google
Best customer service I have ever experienced. They are my go to source do to quality and service
MM
Mike Martinez Aug 25, 2025
Google
Phenomenal company - very rare to come by in the automotive industry. Also very impressing. Let me start here. I got a set of yellow sway bar end links for my 19 ram DT (new body style) and let me tell you, I’m hooked. For numerous reasons. One the craftsmanship behind the product is unmatched for sure for without breaking the bank. 2ndly, they stand behind their product. Had a very minor issue and it was resolved in a blink of an eye!!! Insane. Just because of what i listed above i will forever spend my money with core 4x4! And i think you should too! I have no affiliation at all with this company besides being a consumer. I will be ordering my yellow UCAs and the rest of my rear suspension from them here shortly! Korby on the other hand. The representative that helped me went above and beyond FAST. I hung up the phone with him, and with in no lie 3 minutes he was calling back with an answer. GREAT GREAT GREAT customer service, Korby you and core 4x4 are what give us hope in the car community! With much love and great health to you all!!
BA
bryan angell Jun 26, 2025
Google
First off amazing products. I got a set of adjustable control arms for my XJ and it is so nice to be able to dial in caster and pinion angles. A quick call and I was able to purchase an adjustable track.
A
Adam Oct 24, 2025
Google
I couldn't have been more excited for the initial unboxing of these new Core 4x4 UCA's! They appear to be so well built and just a true quality product. Installation was a breeze and the initial testing with the forklift appears to have given me some additional flex with less binding on the rest of the components now that the geometry is back properly aligned. Time will tell how they hold up on my near future off-road adventures but I don't have any doubt that they are up to the task!
CM
Cameron Masters Mar 24, 2023
Google
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.
BS
Bailey Smith Mar 23, 2025
Google
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.
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