JKS Manufacturing J-Flex Adjustable Lower Control Arms (REAR)

2018–2026 Jeep Gladiator

JKS1662

Overview:

Upgrade your Jeep Gladiator JT’s rear suspension with the JKS Manufacturing J-Flex Adjustable Lower Control Arms. Designed to provide superior strength and precise axle positioning, these control arms are ideal for both stock and lifted Gladiator models. Whether you’re tackling rugged off-road trails or cruising on the street, these arms enhance durability, articulation, and ride comfort by correcting pinion angle and improving rear axle alignment. Built to withstand demanding conditions, the J-Flex arms deliver reliable performance and long-lasting operation for serious Jeep enthusiasts.

Key Features:

The JKS J-Flex Adjustable Lower Control Arms combine innovative design with robust materials to ensure optimal rear suspension performance. Key features include:

• Adjustable length to fine-tune rear pinion angle across a wide range of lift heights (0 to 4.5 inches)
• Heavy-duty 2-inch outer diameter, .250-inch wall DOM steel tubing for enhanced strength and durability
• Premium OE-style rubber bushings at the axle mount to reduce noise, vibration, and harshness (NVH) for a smoother ride
• Unique hex-shaped threaded bung at the frame side for easy adjustment of the forged flex end
• Forged flex joint design allowing up to 30 degrees of misalignment (15 degrees in either direction) for superior articulation
• Greaseable flex ends to extend bushing life and maintain smooth operation
• Rebuildable flex ends for long-term serviceability and cost-effectiveness
• Durable gloss black powder coat finish for corrosion resistance and lasting appearance
• Sold in pairs, fully assembled and ready to bolt in

Construction & Design:

The J-Flex control arms are engineered from heavy-duty DOM (Drawn Over Mandrel) steel tubing measuring 2 inches in diameter with a .250-inch wall thickness, providing a substantial upgrade over factory components. This construction ensures exceptional rigidity and resistance to bending or fatigue under extreme off-road conditions. The axle-side bushings utilize durometer-specific rubber to isolate NVH, enhancing ride comfort without sacrificing strength. The frame-side flex ends are forged for durability and feature a unique hex-shaped threaded bung, allowing precise length adjustments and accommodating suspension articulation with up to 30 degrees of flex. The entire assembly is finished in a tough gloss black powder coat to protect against corrosion and wear.

Installation & Fitment:

These J-Flex Adjustable Lower Control Arms are designed for direct bolt-in installation on most 2018 through 2026 Jeep Gladiator models, including popular trims such as the Rubicon, Mojave, Overland, Sport, Willys, and special editions like the 80th Anniversary and Launch Edition. No major modifications are required, making them an excellent upgrade for both stock and lifted Gladiators with lift heights up to 4.5 inches. The adjustable length feature allows you to dial in the rear pinion angle precisely, ensuring optimal drivetrain alignment and reducing driveline vibrations.

What's Included:

• Pair of JKS J-Flex Adjustable Rear Lower Control Arms
• Greaseable forged flex ends with jam nuts
• OE-style rubber bushings installed at axle mounts
• Installation hardware (where applicable)
• Limited lifetime warranty documentation

Ideal For:

The JKS J-Flex Adjustable Lower Control Arms are perfect for Jeep Gladiator owners seeking enhanced rear suspension strength, improved articulation, and precise axle alignment. Whether you’re an off-road enthusiast tackling technical trails, a weekend adventurer upgrading your Gladiator’s suspension, or someone looking to correct pinion angle on a lifted vehicle, these control arms provide a durable, maintenance-friendly solution that improves overall ride quality and drivetrain longevity.

JKS Manufacturing builds Jeep and off-road suspension parts—lift systems, control arms, track bars, disconnects, and supporting hardware—engineered for articulation and durability. It’s a popular choice for Wrangler and Gladiator owners looking to improve clearance, ride quality, and capability for real trail use.