ReadyLift Terrain Flex 4-Arm Kit With Falcon 2.1 Monotube Shocks 2020-2026 Jeep JT Gladiator

The ReadyLift Terrain Flex 4 Inch Lift Kit Jeep JT Gladiator is a complete and thoroughly tested suspension upgrade that delivers a taller trail-ready stance, clearance for up to 37-inch tires, and the kind of on-road comfort and off-road flex that dedicated Gladiator owners demand from a serious lift system. Part number 69-6041: 

This system was tuned over months of interstate driving and extreme rock crawling to achieve the ideal balance of stability, articulation, and daily drive comfort across all the conditions a Gladiator JT encounters. At IMM Hawaii Parts, we carry this kit for Gladiator owners who want a lift system that performs as well on the highway as it does on the trail without making compromises in either direction.

ReadyLift Terrain Flex 4 Inch Lift Kit Jeep JT Gladiator With Falcon 2.1 Monotube Shocks

All four Falcon 2.1 monotube shocks in this system are tuned with vehicle-specific valving developed specifically for the Gladiator JT platform running a 4-inch lift kit. The monotube design provides consistent and predictable damping through the full range of suspension travel, controlling heat buildup during sustained off-road use and preventing the aeration and fade that twin-tube shocks develop under hard use. 

These shocks are tuned to balance stability for highway driving, heat control for long trail runs, and the compliance needed for serious articulation on technical terrain, making them the right match for a Gladiator that gets used for everything from daily commuting to rock crawling. Customers at IMM Hawaii Parts consistently choose this kit for its Falcon shock quality and the confidence that comes with purpose-tuned damping for this specific platform.

4 Inch Front Coil Springs Built for Added Front-End Weight

The 4-inch replacement front coil springs in this system are wound with increased wire diameter compared to standard replacement springs, giving them the added load capacity needed to handle the extra front-end weight that comes from winches, steel bumpers, and other heavy aftermarket accessories commonly installed on Gladiator builds. This spring design ensures the front of the Gladiator sits at the correct 4-inch lift height even when loaded with heavy front-end accessories that would compress a standard spring below the intended lift height. The increased travel designed into these springs also benefits articulation performance on the trail.

Dual Rate Rear Coil Springs for Optimum Traction and Ride Quality

The dual-rate rear coil springs in this system use a precisely set transition point and range that deliver a comfortable initial spring rate for light loads and daily driving and a firmer overload rate when the suspension is pushed into its secondary range under heavy loads or during aggressive trail use. This dual-rate design gives the rear of the Gladiator the traction and articulation needed on the trail while maintaining a composed and comfortable ride on the highway, making the system genuinely versatile across all the use cases a Gladiator JT is built for.

Heavy Duty Lower Control Arms With TCT Bushings

The heavy-duty lower control arms in this kit are built from 0.188-wall steel tubing and equipped with ReadyLift's Terrain Control Technology non-bonded, maintenance-free bushings that provide maximum articulation and quiet operation without requiring periodic greasing or servicing. These arms are designed with correct caster built in to maintain proper front-end geometry after the 4-inch lift is installed, which improves straight-line tracking, steering feel, and tire wear pattern on the lifted Gladiator. The combination of heavy-duty construction and correct caster geometry makes these arms a meaningful upgrade over the factory lower control arms at this lift height.

Complete System With HD Track Bar, Sway Bar Links, and Bump Stop Extensions

In addition to the coil springs, shocks, and control arms, this system includes an adjustable front track bar, longer sway bar end links, and front and rear bump stop extensions that correct all the geometry changes that come with 4 inches of lift on the Gladiator JT. The adjustable track bar allows precise axle centering after the lift is installed; the longer end links correct the sway bar angle for improved stability, and the bump stop extensions prevent premature contact at the limits of suspension travel. All required hardware and detailed installation instructions are included.

Tire and Wheel Fitment

This lift system supports tires up to 37 inches in diameter on the 2020 through 2026 Gladiator JT. Actual fitment can vary based on wheel width, offset, and specific build configuration, so always test clearances before finalizing your wheel and tire setup. Contact IMM Hawaii Parts for personalized wheel and tire recommendations for your specific Gladiator build.

Important Compatibility Notes

Adaptive Cruise Control requires dealer zero-point calibration after installation. This kit is not compatible with the Mojave Edition or optional powertrains including the 3.0L Diesel, Rubicon 392, and 4xe. Professional alignment is recommended after installation. This system fits all Gladiator JT trims except those listed as incompatible.

Product Details

Who Should Choose This Kit?

The ReadyLift Terrain Flex 4 Inch Lift Kit Jeep JT Gladiator is the right choice for 2020 through 2026 Gladiator JT owners who want a complete and properly engineered 4 Inch Lift system with Falcon 2.1 monotube shocks, dual-rate rear coil springs, heavy-duty lower control arms, and all required geometry correction hardware. Shop this kit and complete Gladiator wheel and tire packages at IMM Hawaii Parts, where our team can help you build the perfect lifted Gladiator JT setup for trail use and daily driving alike.

Need help choosing the right parts for your vehicle? Contact IMM Hawaii Parts today for expert advice and trusted customer support.