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Old 05-10-2019, 10:28 PM
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Help needed with rear articulation

I have a 2016 JKUR that I put a 2.5” AEV lift on. My issue is that I put 37” tires on and my rear tire is close to the rear pinch seam. How can I get more articulation out of the rear without having to cut the pinch seam? I was thinking about trying to move the rear axel back by getting rear upper and lower adjustable control arms. What do you guys think? Or is there a better solution other than getting smaller tires? If this is the right solution what control arms do you recommend?

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Old 05-10-2019, 11:07 PM   #2
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A friend just had the pinch seam trimmed at a local shop for $100. Personally, I would chop it in a heartbeat.

Do you really need more articulation or just to "not" rub at full flex.

Certainly rear arms can help move that axle back further

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Old 05-12-2019, 11:56 AM
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Thanks, kind of going for both, no rub and more flex.
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Old 05-12-2019, 02:27 PM   #4
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Both. Don't pay someone to chop that pinch seam, do it yourself, it's not hard.
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Old 05-12-2019, 02:40 PM
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Wanted to do both, no rubbing and get more flex
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Old 05-12-2019, 02:43 PM
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Was hoping not to have to chop. Looks like if I chop, I will need to cut more than an inch off and then I will have to fill the cut with some material. Just don’t want to compromise the body or make it ugly.
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Old 05-12-2019, 03:09 PM   #7
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With the older JK / JKUs it was common to trim that pinch weld. But on a 2016 you should not have to, it is already "trimmed" from the factory.
We have a 2016 JKU with around 2.5" of lift and 37" tires. The pinch weld is close, but it does not make contact. The best solution would be adjustable rear arms, but you can trim the pinch weld if you need to. We did have to trim the Rock Rails, but on ours the pinch welds clear (barely).
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Old 05-14-2019, 10:55 AM
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I already trimmed about 2” off of the rock sliders. I agree I think I will need to do both. I just really didn’t want to have to cut the pinch seam.

What brand/model of adjustable control arms do you recommend?
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Old 05-14-2019, 11:14 AM   #9
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Cut the pinch seam for sure, but adjustable control arms with better joints (like Heim joints) will not only recenter your wheel but allow for more articulation as they won't resist misalignment like the OEM bushings.

I have a Rock Krawler X-Factor lift, the flex is really good. You can buy just the arms from them.
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Old 05-15-2019, 09:42 AM
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I was interested in the teraflex alpine arms and the Metalcloak arms. Any thoughts? I use my Jeep as a daily driver so I want to make sure it still drives and behaves well on and off road.
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Old 05-15-2019, 09:55 AM   #11
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I was interested in the teraflex alpine arms and the Metalcloak arms. Any thoughts? I use my Jeep as a daily driver so I want to make sure it still drives and behaves well on and off road.
I have the TeraFlex Alpine arms. I like them. They are very easy to adjust. There are arms that will articulate a little better, as the TF Alpine arms use "rubber" bushings on both ends. The arms that use Johnny Joints or similar would be an option, like Metal Cloaks arms. But they may not be as easy to adjust. Another arm I looked at, and keep looking at, is the EVO arms. As I recall they use Johnny Joints.
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Old 05-15-2019, 01:55 PM   #12
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Might look at the core 4 x 4 arms. I don't have them but have heard good things about them. Just another option.

I wouldn't hesitate to cut.
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Old 05-15-2019, 02:04 PM   #13
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i vote to cut it with a angle grinder.. love using my new $18 HF angle grinder on things



my rubi rails = cut
that little tab under the front fender flares = cut


looks like my pinch seem is cut already or i think after a certain year they started trimming those, right?


i have a 2016 JKUR.. your pinch seam should be trimmed, no???
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Old 05-16-2019, 10:10 PM
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Yes since mine is a 2016 it came trimmed from the factory, but it is only about 3/4” from my tire.
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Old 05-16-2019, 11:09 PM   #15
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I don't think the pinch seam or control arms are the issue. You shouldn't need to adjust either for that high of a lift. To get good articulation and have room with 37s" you should be looking at more lift. 3.5" with adjustable arms would do the trick.

If you are set on getting a little more room then go with the control arms, but keep in mind you can't just move the axle back without throwing off everything else (springs, bump stops etc.). At 2.5" the axle has only moved forward slightly.
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Old 05-17-2019, 02:05 AM   #16
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He doesn't need more lift - he needs to clear the tire. The only way to do that is trimming or bumping the axle back.
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Old 05-17-2019, 06:11 AM   #17
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He doesn't need more lift - he needs to clear the tire. The only way to do that is trimming or bumping the axle back.
Yes, but he seems worried about it being "close". I could be wrong but I think he doesn't actually need to trim the pinch seam to clear. Sure it looks close, but as the rear suspension compresses the rear tire will actually move backwards as it moves up. So, unless the OP has confirmed that it does indeed make contact I think he is fine. We have 37's on a small lift and while it was close it never hit the pinch seam. It did rub the rails, or it looked like it would, so we trimmed those (as it seems the OP has). It also rubbed the plastic on the inside of the fender well, having to do with our Mopar High Top fenders we used to run. We trimmed those and it was fine. They are since gone, and we now have adjustable upper arms to adjust pinion angle, The side effect of that is it also is moving the rear axle back a little which better centers the wheels in the wheel wells.

What he should do is flex out the suspension. It either clears or it rubs. If it does not rub, it clears.
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Old 05-17-2019, 08:53 AM   #18
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You are correct- all he needs to do is clear. It may be by a mere fraction, but if it clears, it clears.

I didn't need to trim my front pinch seam (2014) nor my Rubicon rails (I did trim them tho just because I thought it looked better lol). I did trim that pointy edge at the rear tho.
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Old 05-17-2019, 11:23 PM
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Thanks for all the information, I will try and get it flexed out over the weekend and let you know if it actually hits. I will be surprised if it does not.
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Old 05-17-2019, 11:27 PM
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Mommy how did you trim your pinch seam? Which method? Cut it totally off or the cut/bend/fold?

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