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Old 03-17-2013, 12:00 AM   #1
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JKS Control Arms

So, I have been doing a look see around - have read literally dozens of pages of suspension threads and noticed something: they don't seem to get much love. Maybe it's the price. I see a bunch of folks that will rock TF, RK, RE, FT, MC or whomever...not too many rolling with JKS.

I find that somewhat perplexing. Lots of folks go to JKS for steering reinforcement, track bars, end links, etc. Once in a while, you find someone who wheels them and likes them, but mostly they are completely left out of the discussion. Their control arms are an interesting concept - so, for those that have swapped their control arms I have a question:

Did you even consider JKS when you thought about your options? If you're not running them, why not? What are you running instead?

I figure with as much time as I've spent reading on control arms lately, I might as well stir some discussion here.

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Old 03-17-2013, 07:58 AM   #2
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My guess would be the price and using the factory clevite bushings. No doubt the quality is top notch. the cost for little to no increased misalignment over stock would steer me in another direction.

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Old 03-17-2013, 11:14 AM   #3
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Quote:
Originally Posted by kjeeper10 View Post
My guess would be the price and using the factory clevite bushings. No doubt the quality is top notch. the cost for little to no increased misalignment over stock would steer me in another direction.
X2. Little to no articulation just beefy stock replacement that's why TF RK currie. Way better and more popular
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Old 03-17-2013, 11:18 AM   #4
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KJeeper,

An interesting point, re: misalignment. The JKS design philosophy on these is that the control arm can rotate independently at both ends. In theory this provides for infinite twist to the arm itself. As I understand the idea - the bushing/clevite joint is not required to deform/twist because the arm itself is doing the work.

I wonder if someone who runs/ran these can comment on how well that actually works. From what I can tell, Johnny Joints, Heim Joints, Duoflex joints, etc. are all designed to allow twisting of the joint in the mount. If the arm itself could twist, then theoretically the joint/mount wouldn't need to.

Of course, aside from whether it works, there are other considerations. Some might see the strength as a draw back compared to someone like RK since the arms are clearly not solid hunks of metal. Others might not be able to justify the cost over something like a MC arm which offers what is arguably a comparable ride quality and considerable misalignment capability.

Actually, that makes me wonder - JKS Arms with Metal Cloak Duoflex joints - Duoflex joints are cheap - especially if you can afford JKS Arms. I wonder if anyone runs that? Anyhow, really just wanted to solicit some real world feedback and maybe some technical discussion beyond "I have them, I like them."
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Old 03-17-2013, 12:02 PM   #5
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I was unaware of the twisting action of the arms.



Will wait and see if anybody's run them.
I myself plan to use the duraflex bushings in TF arms.
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Old 03-17-2013, 12:11 PM   #6
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I am running all eight JKS arms. They flex pretty well.

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Old 03-17-2013, 12:18 PM   #7
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I think the JKS arms are the nicest ones out there, Unfortunately they dont make a full set any more. I was able to get all but their rear uppers and have a pair of the JKS(JSPEC) rear uppers ordered. The factory bushings should out last every other control arm design on the market. Sure some arm ends can be rebuilt, but I'm guessing 90% of the people don't want to deal with that. I haven't installed the ones I have yet, I'm waiting till after my Moab trip to see if these AEV drop brackets have the front lowers dragging and sliding on the ledges, if they do drag I'm removing the drop brackets.
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Old 03-17-2013, 12:35 PM   #8
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I was looking a these a while back. They only offer the rear lowers and front uppers for the JK (the ones that rotate at both ends with the OEM like bushings).

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Old 03-17-2013, 03:14 PM   #9
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Re: JKS Control Arms

Sorry fellas I didn't realize I had wandered into the JK forum.
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Old 05-07-2013, 03:28 PM   #10
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A little late to the party, and I have a TJ instead of a JK, but I have used the same set of 8 for 5 years and 60,000 miles. Still on original bushings and the flex/misalignment is excellent. I have no complaints about these arms. I use them with 4 inches of lift, 35 inch tires, and go wheeling in rocky terrain about twice a month on average. Just spent 7 days wheeling at Moab EJS and the Jeep worked very well. Just felt the thread needed some input from someone who has run them for a long time.

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