RockJock's narrow forged Johnny Joints for fabricators and suspension system builders offer 40 degrees of unrestricted movement in any direction as compared to 22 degrees on a common heim joint! Johnny Joint rod ends offer cushioning that a heim joint cannot provide via high-density urethane bushing that encases the inner ball. The heat treated center balls are cross-drilled for thru-bolt lubrication and the joint internals are retained with 2 heavy duty, heat treated side washers and a snap ring. This specific joint is a 2 in. diameter, narrow body and features a 9 in. long shank, from CL of joint to end of tip of threads), 3 1/2 in. of 1 in.-14 RH threads and a 1.600 in. wide x .510 in. thru-hole center pivot ball. Being that, in our applications, we use this specific joint in TJ, LJ, XJ, MJ and XJ front trac bars, the shank portion features a 12 degree vertical bend, 3 1/2 in. from the joint Cl, as seen in the photo, making it specific to fitment in this application. Finish is gold zinc plating. RockJock Forged Johnny Joint Rod Ends are found incorporated into our suspension kits and components, but are also available individually for universal usage when custom suspension is being fabricated. Joint is externally greasable via a zerk fitting. Finish is gold zinc plating.
| Brand | RockJock |
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Ajay Paynter
Mar 4, 2026
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Great company, who worked with me on shipping parts to arrive in time for a show. When I explained my concern they went above and beyond to make it happen. Quality of the parts is top notch.
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Ryan Colligan
Mar 4, 2026
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I have nothing but good things to say about Core 4x4. I have the crawler series on my JKU and we take it all over the place. These parts handle everything we throw at them.
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Marcus Torres
Jan 15, 2026
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Best control arms I have installed on any of my builds. After running every major manufacturer, Core 4x4 is on par or better than all the high-end companies at a fraction of the cost. Lifetime warranty is the cherry on top.
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Anthony Snyder
Jun 26, 2025
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Great experience and really great parts
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Sal Torres
May 27, 2025
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upper control arms look great and went on easy.. only reason I gave 4 stars and not 5 is because of a shipping issue which put my build a week behind. The issue was resolved quickly and painlessly, great customer service. Only time will tell how control arms perform but they look great and like they will go above and beyond control arm demand.
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Eric Labrum
May 27, 2025
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Best customer service I have ever experienced. They are my go to source do to quality and service
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Jeffrey Shafer
Jan 22, 2026
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Exceptional customer service. All my questions were asked in a timely manner and parts were replaced when an error occured. I encourage people to make purchases due to their exceptional quality products, but also because of their customer service. Will make additional purchases in the future.
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Robert C
May 27, 2025
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Fantastic products! Outstanding performance!! Absolutely the best customer service!! You will not be disappointed!
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Mr. V
Mar 24, 2021
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Good quality parts, much stronger than stock
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DANIEL DUSSAULT
Nov 23, 2025
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Very beefy items for a very reasonable price. Personally have CORE rear track bar and all upper control arms for my 04 Jeep TJ. Had a slight issue with control arm length and they went above and beyond to swap jam nuts to get me where I needed to be. Really have to appreciate a company like this.