RockJock RJ-144400-101 Rear 3.5in Lift Coil Springs for 2018-2024 Jeep JL

Vehicle Fitment

• 2018-2024 Jeep Wrangler JL Unlimited (4-Door) - 3.6L V6, 4WD; rear suspension
• 2018-2024 Jeep Wrangler JL Unlimited (4-Door) - 2.0L Turbo I4, 4WD; rear suspension

Fitment Notes

• Position: Rear.
• Provides approximately 3.5 inches of rear suspension lift.
• Designed specifically for JL Wrangler Unlimited 4-door models equipped with the 3.6L V6 or 2.0L Turbo I4 gasoline drivetrain.
• Not intended for EcoDiesel, 392 HEMI or 4xe Hybrid applications; RockJock specifies different rear springs for those drivetrains.
• For use with factory upper and lower coil spring isolators.
• RockJock recommends appropriate rear bump-stop extensions with these springs.
• Actual lift height varies with factory vehicle specifications and the weight of added aftermarket equipment.
• Compatible with RockJock Johnny Joint suspension systems and other manufacturers' 3-5 inch lift systems.
• This is a rear spring pair only; front springs, shocks, control arms, bump stops and other suspension components are not included.
• 2025-2026 fitment is not included because complete model-year confirmation for this exact spring application was not established.

Features

• RockJock-spec dual-rate rear coil spring design.
• Approximately 3.5 inches of rear suspension lift.
• Soft initial spring rate absorbs small bumps and trail chop.
• Firmer secondary spring rate helps absorb larger impacts and reduce bottoming.
• Strategically positioned crossover point keeps part of the softer initial rate active at ride height.
• Designed to improve off-road suspension flex and articulation.
• Maintains a controlled, comfortable ride for street and trail use.
• Direct replacement for the factory rear coil springs.
• Compatible with RockJock Johnny Joint suspension systems.
• Can be used with other manufacturers' 3-5 inch lift systems.
• Designed for use with factory upper and lower spring isolators.
• Gloss-black powder-coated finish provides durable surface protection.

Specifications

• Brand: RockJock
• Part Number: RJ-144400-101
• Product Type: Rear Lift Coil Springs
• Position: Rear
• Lift Height: 3.5 inches
• Spring Type: Dual-Rate Coil Spring
• Application: Jeep Wrangler JL Unlimited 4-Door
• Engine Compatibility: 3.6L V6 and 2.0L Turbo I4 gasoline engines
• Drivetrain: 4WD
• Spring Free Length: 17.460 inches
• Finish: Gloss Black Powder Coat
• Installation: Direct Factory-Spring Replacement
• Quantity: Pair

Included Components

• 2x RockJock RJ-144400-101 3.5-inch Lift Rear Coil Springs

Product Description

The RockJock RJ-144400-101 is a pair of 3.5-inch lift rear coil springs engineered for four-door Jeep Wrangler JL Unlimited models equipped with the 3.6L V6 or 2.0L Turbo I4 gasoline drivetrain. These RockJock-spec dual-rate springs use a softer initial rate to absorb small bumps and trail chop, followed by a firmer secondary rate for larger impacts and improved resistance to bottoming.

The rear springs provide approximately 3.5 inches of suspension lift and directly replace the factory rear coil springs. RockJock positions the dual-rate crossover so that part of the softer initial rate remains active at ride height, helping balance on-road comfort with increased off-road suspension flex. Each spring has a verified 17.460-inch free length and a gloss-black powder-coated finish.

RJ-144400-101 is designed for use with factory upper and lower coil spring isolators and can be paired with RockJock Johnny Joint suspension systems or other manufacturers' 3-5 inch lift systems. The spring set is specifically excluded from EcoDiesel, 392 HEMI and 4xe Hybrid models, which use different RockJock rear spring part numbers. Actual lift height can vary according to factory vehicle configuration and added aftermarket equipment.