Superior Suspension Performance for Your Jeep Comanche MJ
Upgrade your Jeep Comanche MJ with the Crawl Series Long Arm Upgrade Kit, designed to enhance axle stability, optimize suspension geometry, and improve overall ride quality. Unlike radius-style long arms that create single points of failure, this long arm design features both long lower and upper control arms, delivering superior strength, stability, and articulation for on-road comfort and off-road performance.
Key Features and Benefits
- Long Arm Design – Maximizes suspension travel, improves ride quality, and eliminates the binding issues of short arms.
- Heavy-Duty Construction – Built with .313-inch wall DOM tubing for superior strength and durability in extreme conditions.
- High-Clearance Crossmember – Designed for improved ground clearance and obstacle navigation.
- Adjustable for Various Lift Heights – Works with lifts from 2 inches and up, making it a perfect low center of gravity (LCG) option for better stability.
- 100% Bolt-On Installation – Includes weld surfaces for those seeking additional reinforcement.
Built for Strength and Performance
The Crawl Series Long Arm Upgrade Kit is engineered for maximum articulation and control. With long upper and lower control arms, your Jeep’s suspension cycles on a longer arc, allowing for smoother and more predictable handling. This reduces driveline strain and provides better overall ride quality, whether on technical rock crawls or daily commutes.
Optional Axle Side Upper Bushing Upgrade
While factory bushings offer adequate performance, they can wear prematurely under extreme conditions. We offer two upgrade options:
- Polyurethane Replacement Bushings – Provides increased durability and longevity.
- Rock Jock Axle Side Johnny Joint Upgrade Kit – Replaces factory rubber with Johnny Joints for the best articulation and longevity (cutting and welding required for installation).
Two-Stage Powder Coating for Maximum Durability
Every component in this kit undergoes a dual-layer powder coating process for superior protection.
Zinc Primer Base Coat – Provides corrosion resistance to prevent rust.
Durable Top Coat – Available in 10 color options to customize your Jeep’s suspension.
Made in the USA
Proudly manufactured in Orem, UT, the Crawl Series Long Arm Upgrade Kit is built to the highest American craftsmanship standards. By sourcing local materials and maintaining strict quality control, we ensure a premium product that delivers unmatched durability and performance.
Vehicle Fitment: Jeep Comanche MJ 85-92 – Enhances suspension geometry for improved ride quality, axle stability, and articulation while increasing ground clearance for off-road performance.
CORE Advantage: True long-arm design eliminates binding and harsh angles in short-arm setups, providing smoother suspension cycling, superior stability, and increased articulation on extreme terrain.
Adjustability: Optimized for lifts from 2 to 6 inches, allowing precise axle re-centering, pinion angle correction, and suspension tuning for a balanced ride and improved wheel travel.
Construction: Built with ¼” plate steel brackets, a high-clearance crossmember, and 5/16” wall DOM tubing, reinforced for maximum strength, durability, and impact resistance on rugged trails.
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
Front Lowers Built With 1.75” OD 5/16” Wall DOM. Welded Johnny Joint on the fixed end and a Forged Johnny Joints on the adjustable end with 1.25” x 12 TPI - 2.625” long threads.
Front Uppers Built With 1.5” OD 5/16” Wall DOM. Welded u-bracket on the welded end and a Forged Johnny Joints on the adjustable end with 1” x 14” TPI - 2.32” long threads.
| Make | Model | Submodel | Years |
|---|---|---|---|
| Jeep | Comanche | 1986 - 1992 |
Each rebuild kit includes all necessary components to replace and restore wearable parts.
Construction & Materials
Front Lowers Built With 1.75” OD 5/16” Wall DOM. Welded Johnny Joint on the fixed end and a Forged Johnny Joints on the adjustable end with 1.25” x 12 TPI - 2.625” long threads.
Front Uppers Built With 1.5” OD 5/16” Wall DOM. Welded u-bracket on the welded end and a Forged Johnny Joints on the adjustable end with 1” x 14” TPI - 2.32” long threads.
| Vehicle | Jeep Comanche MJ (86–92) |
| 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 |
| Lift Size | 0" — 6" or 6"+ |
| Long Arm Kit Front Track Bar Add-On | No or Yes, include optional Track Bar |
| Axle End Upper Joint Upgrade | No-Maintain factory mounting point or Yes-Include Johnny Joint Upgrade (CE-9102K1) |
| Placement on Vehicle | Front Upper, Front Lower, Front |
| Mounting Style | Bolt-On |
Reviews of Core 4x4
Specifications
| Color | 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. |
| Lift Size | 0" — 6", 6"+ |
| Long Arm Kit Front Track Bar Add-On | No, Yes, include optional Track Bar |
| Axle End Upper Joint Upgrade | No-Maintain factory mounting point, Yes-Include Johnny Joint Upgrade (CE-9102K1) |
| Vehicle | Jeep Comanche MJ (86–92) |
| Brand | CORE 4X4 |
| Series | Crawl Series |
| Note to Core4x4: | - |
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