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Old 03-14-2015, 10:51 AM
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AEV 3.5" - rear control arms?

I have AEV's 3.5" lift and 35s on my 2015 jkur. The kit doesnt address the rear control arms at all. It looks to me like the rear axle is pulled forward a little bit. I'd like to center it in the wheel well but not sure if I need rear uppers, lowers, both or should I just leave it alone.

One of the reasons I went with the aev is because there isn't much to adjust. Just install and forget it. I don't really want to mess with jam nuts. I see a couple companies make longer, fixed lowers. Would these work to move my axle back some?

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Old 03-14-2015, 11:06 AM   #2
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2 doors need the correction more then 4 doors. But in order to move the axle back, you will need both upper and lower control arms.

Yes, Synergy makes a fixed lower +1/2. You would want a adjustable upper to see pinion angle.

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Old 03-14-2015, 11:09 AM   #3
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Matter of fact, in the stage III kit synergy uses fixed lowers and adjustable uppers.
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Old 03-14-2015, 11:17 AM
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Are there any benefits of running only the fixed lowers?
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Old 03-14-2015, 11:39 AM
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Looks like the synergy adjustable uppers and fixed lowers run about $500. Would they make enough of a difference or would that money be better spent elsewhere?
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Old 03-14-2015, 12:54 PM   #7
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Quote:
Originally Posted by msubrave View Post
Looks like the synergy adjustable uppers and fixed lowers run about $500. Would they make enough of a difference or would that money be better spent elsewhere?
Do you wheel ? Arms will move the tire away from the seams and provide a little more clearance.
Driveshaft angle is not really a concern on a 4 door unless you were running a aftermarket driveshaft.

I'd say if you were running 37's .. Yes. Your choice otherwise.
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Old 03-14-2015, 01:20 PM
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I'm in ms so mainly muddy logging roads at the deer camp, but I have a trip planned to ouray in july. On 35" mtr's currently but thinking about 37s next. Might go ahead and get them now so it's one less thing on the 37" upgrade to-do list.
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Old 03-14-2015, 05:18 PM   #10
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If you are going to replace the control arms you might as well get the benefit of adjustability for a small increase in price. It is worth the extra cost and additional maintenance on any lift over 3". The rears will allow you to rotate the rear axle to find a nice balance between the coils the sitting flat on their perch and the pinion angle. This is akin to the front tradeoff between pinion angle and Caster angle.

Take a look at the MetalCloak control arms they have great geometry and articulation. They are a perfect match for the a great lift kit like the AEV 3.5.

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