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SKU: RJ-TJ0000-101
Regular price $2,530.00

Product details

  • SKU RJ-TJ0000-101

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RockJock's Sport Edition Johnny Joint Suspension System for TJ Wranglers provides 4 inches of lift and allows for efficient clearance of up to 35 in. tall tires (w/ the use of a 1 in. Body Lift and a 1 in. Motor Mount Lift or aftermarket fenders)!
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 hit some intermediate trails on the weekend! 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!br> Premium shock packages from Rancho 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:

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. Learn more here.
Johnny Joint Trac Bar - our heavy duty chromoly front trac bar combines a precise fit with increased strength and adjustable length to perfectly center the front axle under the vehicle. High-articulation Johnny Joint ends provide maximum durability and suspension flex.

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.

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


  • This amount of lift on a TJ makes a transfer case tail shaft slip yoke eliminator kit mandatory.