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Discussion Starter #1
Hi,

Haven't been on the forum for a while, and the new format is not working very well for me (cant find my old posts, search doesn't work, etc.).

I need to replace both sets of ball joints for my JKUR and am looking for some recommendations for HD options. Since i cant find my autosig or build thread - here is a quick summary:

2016 JKUR
4.5" lift / running 37's
just replaced OEM steering stabilizer with a Fox
heavy build - lots of steel (roll cage, skid plates, bumpers, etc.)

The local shop is recommending Moog, but i have no experience with them. Two other options that are widely recommended and brands i already run are Synergy and Teraflex - which would be my preference.

At any rate, i would welcome and inputs on this request.
TIA
D
 

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Not Moog, they're pretty crappy. I've installed 2 sets of them on friend's Jeeps.

I wasn't happy with my last set of Synergy and the wife had been running Teraflex on hers, so I gave them a go on mine. Happy with them on both Jeeps (1 on 37s, 1 on 40s)

I've helped install Rare Parts and they seem really nice, but really pricey. I have no experience with Dynatrac but they seem to get good reviews on the forum.
 

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Discussion Starter #3
Not Moog, they're pretty crappy. I've installed 2 sets of them on friend's Jeeps.

I wasn't happy with my last set of Synergy and the wife had been running Teraflex on hers, so I gave them a go on mine. Happy with them on both Jeeps (1 on 37s, 1 on 40s)

I've helped install Rare Parts and they seem really nice, but really pricey. I have no experience with Dynatrac but they seem to get good reviews on the forum.
Hey BBS, long time no "chat" - hope you and the fam are safe / well.

Between the TF options any insights on which you used / recommend?



The Dynatracs look interesting and are made in USA - which is a plus. Same question there, is which one do i go with?



Thanks for jumping in with the advice as usual!
D
 

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Discussion Starter #5 (Edited)
Teraflex ball joints are adjustable not rebuildable.
Thanks DVB - i misread your post ignore previous reply - now just down to picking a brand and trying to determine if i need/want knurled or not.

all things being equal, i will likely do the Dynatracs since they are made in US
 

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All good here, thanks for asking. Hope you're doing well!!

I went with knurled on mine because the synergy I replaced were knurled. The knurled are slightly larger, so had I gone with non-knurled they might not have fit as snug as I would like.
The wife's was a fresh axle so we skipped the knurl.
 

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Saw these recently, thinking they might go on my JKU. Made in USA too.


Synergy start off tight and can take a while to break in for sure.
 

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All good here, thanks for asking. Hope you're doing well!!

I went with knurled on mine because the synergy I replaced were knurled. The knurled are slightly larger, so had I gone with non-knurled they might not have fit as snug as I would like.
The wife's was a fresh axle so we skipped the knurl.
Ok cool, i will likely go with the Dynatrac knurled option then as I'm sure mine have stretched after 4y of mild to severe abuse.

Thanks again for the insights, invaluable as usual BBS!
 

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Discussion Starter #9
Saw these recently, thinking they might go on my JKU. Made in USA too.


Synergy start off tight and can take a while to break in for sure.
hey pressurized, i saw those on either 4wp or qaudratec as well - but there doesn't seem to be many reviews of people using them with good experience?
 

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hey pressurized, i saw those on either 4wp or qaudratec as well - but there doesn't seem to be many reviews of people using them with good experience?
I don't think they have been out as long as some of the other options and that's why we don't have many reviews. I like the emphasis on load carrying capacity with the upper joint carrying part of the load and made in USA. They look just like the Rare Parts joints to me and at the Morris discount, that's a great buy.


Check the video:


EDIT: I just watched the video again myself and see at one point he holds the joint up and I can read "RARE PARTS" on it.... Bingo!
 

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Ok cool, i will likely go with the Dynatrac knurled option then as I'm sure mine have stretched after 4y of mild to severe abuse.

Thanks again for the insights, invaluable as usual BBS!
If you have done a few ball joint replacements on this Jeep you may need the Knurled BJ's. But if the existing ones aren't knurled you want to keep with that until, after repeated ball joint replacement, the hole gets worn out and the non-knorled ball joints are no longer a tight fit. Going to a knurled ball joint before you need to will speed up the process of the hole being enlarged. Regular use should not affect the hole, it is mainly removing and replacing ball joints that wears on the hole and enlarges it.
 

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I had the Synergy ball joints for a while. They did not last long. I would not recommend. I now have Dynatracs, which have been in maybe a year or less. So far they are fine. I had to go with the knurled ones because the Synergys were knurled. If you’re just replacing the stock ball joints, you don’t need the knurled ones.
 

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I would first get an alignment and check your camber and caster. I would not be surprised if you have a bent axle as it is common with factory tires. If so you can fix your camber and increase caster with off set ball joints. There is only one company that makes them as far as I know. SPC Performance and I think the Napa brand is just a rebranded SPC. They are a high quality joint. You might as well do it right if you are going to do it. I would not waste the money on $600-$1000 ball joints for an axle that is designed for a max 35" tire size. If everything is good as far as caster and camber then I would just go with the Moog and do it yourself.
 

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Ok cool, i will likely go with the Dynatrac knurled option then as I'm sure mine have stretched after 4y of mild to severe abuse.

Thanks again for the insights, invaluable as usual BBS!
stretched from abuse? I

How does one know if on a used vehicle if knurled is needed or not? Age? Mileage? Abuse? Salt-Belt? Are knurled ever a bad choice? They wouldn't make both if they didn't have to....

Lots of questions... I'm in future market for ball joints w/2 JK's of various age/milage. I like to have parts uphand prior to ripping it apart obviously.....
 

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Knurled are needed if the new joints aren't a tight press fit into the holes. If the standard smooth joints fit tightly in the holes, that is what you want to use.
If you go to knurled early, it will work but that will mean that you have fewer ball joint replacements you can do before you have a problem. Because at some point, if you replace ball joints enough, the stock holes for the ball joints will be worn out. The holes don't really get worn from driving the Jeep, they get worn from replacing ball joints. Switching to knurled before it is required would speed up that wear.
Unless you know a vehicle is already running knurled ball joints, in which case you need to continue using knurled ball joints, I would suggest you start with normal smooth ball joints. If, when installing them, you find they aren't fitting tight enough you can swap those for a set of knurled ball joints. I would not go with knurled without knowing I need to.
 

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Oh, and we are running TeraFlex ball joints, but I would happily run either Dynatrac, RareParts, or even Synergy now that they seem to be using the same new design that TeraFlex uses. But my sister in-laws JK did go through an older version of Synergy ball joints rather quickly. But I think the new ones are like the new TeraFlex ball joints.
I am sure there are other good brands, and some are happy to run the stockers. But unless you are running stock size tires I would look for heavier duty ball joints than the stock ball joints.
 

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Just an update... Here's confirmation that the Skyjacker ball joints are RARE PARTS.

4419130
Skyjacker is Rare Parts.jpg
 

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Discussion Starter #19
Thanks to all for jumping in.

So without taking the rig apart, i guess i have the following questions.

1. How do i know if the currently installed units are knurled or not
2. Assuming OEM / non knurled - how do i determine if the currently installed units have expanded and might require knurled now
3. related to the replacement comment, what is the average # of replacements one gets on these - and then what happens when that runs out?
 

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The only way I know of to answer question numbers one and two is to pull the current ball joints and see. Odds are, they are not knurled and knurled ball joints are not needed.
If you buy from a decent vendor and it turns out you need the knurled ball joints I would think they will swap them for you.
I don't have an answer for question three, I have never needed knurled ball joints for.
 
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