Description
Upgrade your Jeep TJ Wrangler with the RockJock Pro Edition Johnny Joint Suspension System, a premium suspension lift kit engineered for maximum strength, articulation, and all-around off-road performance. Designed to deliver approximately 4 inches of lift, this Jeep TJ suspension system provides 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).
Built for serious off-road enthusiasts, the Pro Edition Johnny Joint Suspension System represents the highest level of RockJock engineering, combining superior strength, precision fitment, refined finish, and proven suspension geometry. Every component is designed to deliver long-lasting durability and reliable performance in the most demanding driving conditions.
This Jeep TJ lift kit is engineered to improve both on-road comfort and off-road capability, delivering a smooth, controlled ride on pavement while maximizing articulation and traction on technical terrain. It is a complete direct bolt-on suspension system, designed for straightforward installation with no major fabrication required.
Ideal for rock crawling, overlanding, and extreme trail use, this system is built for Jeep TJ Wrangler owners who want more than just a basic lift. It supports larger tire fitment, increases ground clearance, and provides the confidence needed to tackle the toughest trails with ease.
The RockJock Pro Edition Johnny Joint Suspension System is the ultimate Jeep TJ suspension upgrade for drivers seeking top-tier performance, durability, and off-road capability in a fully integrated lift kit solution.
Kit Fits:
- TJ Wrangler – All Models
Kit Includes:
- 4 in. Lift Dual-Rate Front And Rear Springs
- (8) Johnny Joint Adjustable Control Arms (double adjustable uppers)
- Johnny Joint Adjustable Front Trac Bar
- Johnny Joint Adjustable Rear Trac Bar
- Rear Trac Bar Geometry Correction Bracket
- Front and Rear Bump Stop Kits
- Front Sway Bar Disconnects
- Rear Sway Bar Extended Links
- 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 Bars – Heavy duty trac bars included are our adjustable length chromoly front and rear units. Our trac bars combine a precise fit with increased strength and adjustable length 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 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 Pro Edition Suspension System converts 2 more pivoting points in your suspension to high articulation Johnny Joint rod ends.
- 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
Wheel Backspace:
- 4.5 in. wheel backspace is recommended for all tire sizes
**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.
