Description
Upgrade your Jeep TJ Wrangler with the RockJock Sport Edition Johnny Joint Suspension System, a high-quality suspension lift kit designed to deliver approximately 4 inches of lift and clearance for up to 35-inch tires when paired with a 1-inch body lift and a 1-inch motor mount lift (or aftermarket high-clearance fenders). This Jeep TJ suspension upgrade is engineered to improve off-road capability, ride quality, and overall vehicle performance for weekend trail use and light to moderate off-road driving.
Built with premium components focused on strength, fit, finish, function, and proven engineering, the Sport Edition Johnny Joint Suspension System delivers dependable performance for Jeep owners who want a capable lift kit without moving into a full competition-level setup. It provides improved suspension articulation, increased ground clearance, and a more stable, controlled ride both on and off the road.
Designed as a complete bolt-on Jeep TJ lift kit, this system offers a balanced combination of on-road comfort and off-road capability. It is ideal for drivers who want to run larger tires, improve stance and clearance, and confidently explore intermediate off-road trails.
For enthusiasts planning future upgrades, RockJock offers a full range of compatible suspension components that can be added over time. This allows the Sport Edition system to serve as a scalable foundation for more advanced Jeep TJ suspension builds as off-road demands increase.
Kit Fits:
- TJ Wrangler – All Models
Kit Includes:
- 4 in. Lift Dual-Rate Front And Rear Springs
- Johnny Joint Double Adjustable Front Upper Control Arms
- Johnny Joint Double Adjustable Rear Upper Control Arms
- Johnny Joint Adjustable Front Trac Bar
- Rear Trac Bar Geometry Correction Bracket
- Front and Rear Bump Stop Kits
- Front Sway Bar Disconnects
- 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 your TJ’s fenders!
- Johnny Joint Control Arms – Heavy duty adjustable upper control arms feature RockJock Johnny Joints, the original and most durable high-articulation urethane suspension joint on the market. Johnny Joints feature a smooth steel ball that pivots inside a proprietary urethane shell to provide over 30 degrees (per joint) of quiet, shock dampening articulation – without the excessive deflection found in soft rubber-based flex joints. Johnny Joints are so trusted, that they are used by multiple commercial suspension companies, for both street and off-road suspension systems.
- Johnny Joint Trac Bar – Heavy duty trac bar included is our adjustable length chromoly unit. Our trac bar combines a precise fit with increased strength and adjustable length to perfectly center front axle under the vehicle. High-articulation Johnny Joint ends provide maximum durability and suspension flex.
Optional Add-On Components – Add-on components enable the RockJock Pro Edition Suspension Lift to be customized for increased off-road capabilities and tuning.
- Antirock Sway Bars – Antirocks allow for maximum suspension articulation while providing maximum 4 wheel traction.
- Currectlync Steering System – For maximum strength, reliability and confidence off-road, upgrade your steering!
- Axle Housing Johnny Joints – Adding this simple kit to your Sport Edition Suspension System converts 2 more pivoting points in your suspension to high articulation Johnny Joint rod ends.
- Johnny Joint Adjustable Rear Trac Bar – Adds 2 more Johnny Jointed points for maximum articulation and allows adjustability for perfect alignment. This component is mandatory if you are retaining your stock driveshaft! See notes below.
- Shock Packages – Select from a range of performance shocks with race-proven technology from Rancho and King to meet your requirements.
- Rear Shock Relocation Brackets – Mandatory when using this suspension kit in conjunction with a factory differential to push the lower shock mounting location back outward to an accessible location.
Lift Details – The RockJock Suspension System provides 4 in. of suspension lift.
- Actual lift height may vary due to factory build specs. and added equipment and accessories.
See This Kit:
Tire Fitment:
- 33 in. tires – no other vehicle modification necessary
- 35 in. tires – 1 in. Body Lift and a 1 in. Motor Mount Lift or aftermarket fenders, high-clearance fenders required
- Larger Than 35 in. Tires – we have found provide diminishing return without dramatic modifications to the vehicle
**IMPORTANT**:
- The CE-9121N rear trac bar geometry correction bracket included in this kit is intended for use in conjunction with a transfer case tail shaft slip yoke eliminator kit and a double cardan driveshaft.
- The tail shaft slip yoke eliminator kit we recommend is from Tom Wood’s Driveline. They can also supply the double cardan driveshaft!
- If you’ll be retaining your stock driveshaft, our CE-9120RS Johnny Joint rear trac bar becomes mandatory.
