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4.5 inch lift but I still hit bottom on a bump....on a paved street....is this OK?

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Old Sep 6, 2010 | 05:10 PM
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Default 4.5 inch lift but I still hit bottom on a bump....on a paved street....is this OK?

I have a 4.5 Rubicon Express long arm lift on a 08 Rubi UL. It has Fox reservoir shocks. I still bottom out on the bumpstop on the rear right side when I hit a decent bump, even on a paved freeway. It only happens on one side. I have no idea if this is normal. I would have expected that with a 4.5 inch lift, I wouldn't feel bottom, without a helluva a bump.

Is this normal? Intuitively, it doesn't feel right.

Gratuitous pic of the vehicle in question.



Last edited by Drsalee; Sep 6, 2010 at 05:46 PM.
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Old Sep 6, 2010 | 05:14 PM
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Are you sure its the bumpstop? Maybe put some baby powder or chalk on the bumpstop and see if thats whats hitting. Maybe snap a couple pics on that side to and post up. How long has your RE kit been on ? I've ridden in jk's with re kits, no that is not normal.
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Old Sep 6, 2010 | 05:18 PM
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Originally Posted by mkjeep
Are you sure its the bumpstop? Maybe put some baby powder or chalk on the bumpstop and see if thats whats hitting. Maybe snap a couple pics on that side to and post up. How long has your RE kit been on ? I've ridden in jk's with re kits, no that is not normal.
The kit has been on for about a month and a half. I'm gunna go out and take a pic.
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Old Sep 6, 2010 | 05:20 PM
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Originally Posted by Drsalee
The kit has been on for about a month and a half. I'm gunna go out and take a pic.
Has it done it since install, or just started?
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Old Sep 6, 2010 | 05:27 PM
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Originally Posted by mkjeep
Has it done it since install, or just started?
Since install.......pics inbound. Stay tuned.
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Old Sep 6, 2010 | 05:41 PM
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Old Sep 6, 2010 | 05:43 PM
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Originally Posted by mkjeep
Has it done it since install, or just started?
The bolt on the rear swaybar ? WTF?
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Old Sep 6, 2010 | 05:46 PM
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Looks like your rear trkbar bolt is dingin your rear bumstop pad. I'm thinkin your rear axle is pushed back to far.
edited for terminologybrainfart

Last edited by mkjeep; Sep 6, 2010 at 06:14 PM.
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Old Sep 6, 2010 | 05:50 PM
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Wow!!! Your springs really look bound up!!! Almost like the rear ends are way out of position.. I just installed a Teraflex 4" short arm and my springs are straight up and down.

I am not real sure but it doesn't look right to me. Also rubicon express lifts are famous for "POPing" My TJ does it allot.. But not sure of the design on a JK.
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Old Sep 6, 2010 | 05:56 PM
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Originally Posted by mkjeep
Looks like your rear sway link is dingin your rear bumstop pad. I'm thinkin your rear axle is pushed back to far.
When i first brought it home, the installer told me he pushed the axle back as far as possible, to avoid scraping the stock Rubi rock rails. I took a pick of that when I brought it home. I told him not to worry about it because I had planned on replacing the stock rails. Which I have done.

The question now is: Do I take it back and have them adjust the long arms to move the axle forward, or just modify the bumpstop. I am reasonable sure they will do either.

Pics of the position of the axle before trading out the stock rails and trimming the body.


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