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Discussion Starter #1 (Edited)
Looking for some fresh input on the rare parts/sky jacker ball joints. I found a thread on them but it hasn't been updated and the longest someone on there had them was 7k miles.

I've had synergy ones for 50k miles on 37's and they are not completely shot, I think because I'm not running extremely low backspacing I'm at 4.5" with my 37's. I wouldn't even be looking to change mine yet but I'm getting ready to install some of the Rancho High Steer knuckles Santa brought me so might as well do the ball joints while I'm in there, right?

So that being the case I'm looking at Pro Steers for $500, Rare Parts for $600, or just doing another set of synergy (or teraflex/alloy/etc) for $200.

Hydro assist is pending this year don't know if that affects the decision. Thoughts?
 

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I would be looking at hydro assist way before I looked at $600 ball joints. Hydro assist is an awesome upgrade, that if you're anything like me, will give you a some-what butterfly feeling of happiness. Ball joints are just that, ball joints.


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Fusion last i checked had the best price on them.

Whats more concerning is Synergy joints have Knurls. This can open the holes and cause the new joints to fit loosely. Recently there was a thread discussing this and a few people had issues. DT will sell knurled joints for $50 if you run into that problem.




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I would be looking at hydro assist way before I looked at $600 ball joints. Hydro assist is an awesome upgrade, that if you're anything like me, will give you a some-what butterfly feeling of happiness. Ball joints are just that, ball joints.


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very sound advice ; if I had new knuckles , I'd throw some Synergy in them and spend the big bucks on the ram system to assist steering . Only my .02¢ but after breaking a steering gear once , I don't wanna do so again ...I do have the insintive of having replaced the busted OEM steering gearbox w/ the PSC tapped and hydraulic ready one , tho ...

to be fair, the rare parts BJ tech does seem viable in its means of load handling versus reg , non $600 balljoints :jeep2:
 

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Discussion Starter #5
Hydro Assist is next mod for this year. I'm definitely headed there, and doing ball joints will not affect that.... I'm just wondering what I should do about my balls lol!
 

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I have the DT ProSteers and have had great experience with them. I started with the older DT Prosteer design. I had an issue after a few years of use with the inner teflon liner crumbling and Dynatrac was TOTALLY STAND UP! They stood behind the joints and worked with me to upgrade to the newer design, even when they were out of warranty. I recommend them as a company as well as a good part mfg.
YOU GET WHAT YOU PAY FOR...

I have no experience with the RareParts Joints, but the clearance differences would worry me personally with as long as it took to dial my set up in correctly. The engineering makes complete sense and I like that the top joint mounts in from the bottom and uses threads to keep tight.

But again, no experience with the RareParts style joints here, just online reading, Im sticking with Dynatrac because of how good they are to deal with directly and my own personal experience...
 

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A while ago I heard NAPA sold greasable ball joints for the JK. I never confirmed but if that is the case, buy a pair of those and grease regularly. It will save you a ton over the other options and allow for a replacement more readily
Those aren't cheap. They were around 250ish for both sides last time I went in there and asked
 

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We'll add this hear from a PM response we sent.

First off though, hydro assist amplifies ball joint wear. With a ram, you are going to put significantly more lateral load into ball joints than without.

We're a fan of the Rare Parts. There is no ball joint that won't fail in the traditional design. Just the other week Dynatrac noted on a forum that they have customers who wheel more frequently and have to rebuild annually.

When ball joints fail on a JK, it almost always starts with the lower. On the JK, all the load is on the lower and the upper keeps things straight.

Simply put, Rare Parts started by making the best lower available and then went back to the drawing board and made a complete revolution in design with the upper. It isn't just the weight load that the upper carries that matters, it shares the load from steering forces that you find with large tires and off-roading.

Is that a load of BS? One data point stands out. They have not had a single ball joint wear out yet and they've had them on the road for over 2 years. The original beta customer is in So Cal, running 40" Toyo's and wheels places like the Rubicon and Fordyce nearly every weekend. He had Dynatrac before that and wore them out in less than a year. After 2 years with the Rare Parts, no sign of wear. Rare Parts swapped him for new ones so they could cut them open. They found what was essentially no wear on the joints.

I recommend two ball joints. Spicer OEM and Rare Parts. Rare Parts is the best choice, but for those who don't want to pay it, then I'd go Spicer.

In fact, we are planning to make the Rare Parts ball joints standard on our new D60/44 hybrid axle.
 

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Discussion Starter #15
After pm'ing with Fusion I'm going to place an order for the rare parts. The ball joint install is not something I want to deal with again soon, and with hydro assist pending I want something that will hold up to abuse.

Fusion has great pricing on the rare parts btw!
 

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Omg got to lay off the green stuff LOL


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nah, that wont be good for ya..:smokin:


Very interesting info on the side load on the balljoints. I just continue to grease the Synergy BJ's and while not on Fordyce or Rubicon every week , I flog the 37s pretty hard so it seems inevitable. If/when they kablooey , RPs will be considered first . Impressive about beta rig , too.




 
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