RockJock's Driver Lift Kit for JL Wrangler Unlimiteds with the 392 Hemi engine provides 3 1/2 inches of lift and allows for efficient clearance of up to 37 in. tall tires (larger tires will require aftermarket fenders and minor trimming)!
Comprised of only the highest end components in the areas of strength, fit, finish, function, and the engineering to back them, this kit is more than sufficient for those who want to lift their vehicle, install big tires and maybe hit some dirt roads while overlanding! Included in this kit are our front control arm geometry correction brackets that will restore drivability to the stock feel after lifting, so everyday driving we be just as pleasurable as it was before the lift.
For those who intend to do more serious 4 wheeling and rock crawling, you'll want to look at all of the upgrade parts that RockJock has to offer that can be added to this kit to get your vehicle to it's full potential at any level of off-roading!
Premium shock packages from Bilstein, Fox and King are offered here as options so that you can select the shock brand and performance level that matches your driving style. We always recommend adjustable shocks, as they allow the ride to be tuned to match the terrain and driver’s preference.
 
Kit Fits:
JL Wrangler Unlimited (4-door) – All 392 Hemi Models
 
Kit Includes:
3.5 in. Lift Dual-Rate Front And Rear Springs
Front and Rear Coil Spring Shims (one of each)
Front Control Arm Geometry Correction Brackets
Johnny Joint Adjustable Front Trac Bar (forged, organically shaped)
Rear Trac Bar Geometry Correction Bracket
Front and Rear Bump Stop Kits
Front and Rear Adjustable Sway Bar Links w/ Sealed Ends
Front Brake Line Relocation Brackets
All Required Hardware
 
Kit Features:
RockJock Spec. Dual-Rate Springs - Feature a soft initial rate that absorbs small bumps and trail chop, to deliver a smooth, comfortable ride, while a firmer secondary rate helps soak up larger impacts and reduce bottoming. A key differentiator of RockJock spec. dual-rate springs is the positioning of the crossover point between the initial and secondary spring rates so that a portion of the softer initial rate is available and active at ride height before crossing over to the firmer secondary rate deeper into the travel.
Bump Stop Spacers - Proper bump stop extensions are a must and our heavy duty kits stand up to hard use while keeping the tires off of the shiny new JL fenders! The front bump stops in this kit are unique to the 392 Hemi vehicles.
Geometry Correction Brackets –The front brackets in this kit will put the control arms back in stock position in relation to the axle, correcting caster angle, improving front driveline angle and causing the axle to travel in it's factory intended arc. General road manners and the way in which the vehicle absorbs bumps are restored to stock feel. The rear Trac Bar correction bracket will restore rear suspension lateral geometry and produce better overall vehicle handling by raising the rear suspension roll center to bring it closer to the vehicle’s center of gravity.
Johnny Joint Trac Bar - Forged chromoly, organically shaped front trac bar combines a precise fit with incredible strength and rigidity that is only available via forging. The adjustability feature allows you to perfectly center front and rear axles under the vehicle. High-articulation Johnny Joint ends provide maximum durability and suspension flex.
 
Optional Add-On Components - Add-on components enable the RockJock Driver Lift to be customized for increased off-road capabilities and tuning.
Shock Packages - Select from a range of performance shocks with race-proven technology from Bilstein, Fox and King to meet your requirements.
Antirock Sway Bars - The most popular off-road sway bar on the market enhances off-road driving capabilities with balanced performance of front and rear suspension in rugged off-road conditions. Off-road traction is improved with increased suspension flex and by equalizing and distributing the weight of the vehicle over all four tires - without the overly loose feeling created by sway bar disconnects.
Currectlync Steering System - For maximum strength, reliability and confidence off-road, upgrade your steering!
Johnny Joint Control Arms - Depending on your usage and application, check out our Johnny Joint Control Arm sets and see if they are for you.
 
Lift Details - The RockJock Suspension System provides 3.5 in. of suspension lift.
Actual lift height may vary due to factory build specs. and added equipment and accessories.
 
Tire Fitment:
37 in. tires – no inner fender modification necessary
38 in. or larger tires – aftermarket high-clearance fenders suggested/required
 
Wheel Backspace:
4.5 in. wheel backspace is recommended for all tire sizes