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Old 03-14-2011, 09:52 PM   #1
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Lift Size?

I just purchased a 2006 Rubicon and need to find out two things. First how do I find out what size lift the previous owner installed. I know it is a Rough Country Lift and that its got 33's on 17", but I would like to find out if I can clear 35's.

Second is it normal to have "Popping" sound while clearing larger bumps or curbs with a lift kit installed. I previously had a 2001 Sport and never heard the same sounds. I just want to make sure it is normal.

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Old 03-15-2011, 12:42 AM   #2
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Popping sound is not normal. Nothing in the suspension should have a popping sound.

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Old 03-15-2011, 10:06 AM   #3
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Thanks TexasT, I assumed that it was not supposed to do that. It drives great, just when I encounter bumps is when it starts making those sounds. I'll look into it and see if it is a simple fix.
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Old 03-15-2011, 01:00 PM   #4
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I went to a local shop this morning that does lifts and had them look at it. They said the sound is due to the fact that with it being a 6" lift it has pins instead of bolts for some of the connections. While turning or clearing large obstacles it will shift a minor amount causing the "pop". Here are some pictures of what they were looking at.


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Old 03-15-2011, 01:15 PM   #5
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Have a good look at the control arm bushings.
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Old 03-15-2011, 01:33 PM   #6
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That makes sense. Mine move but don't pop. Sway bar links are great but they can be a pain for a daily driver as they are not the solid piece of steel they replace. Won't do any harm or hinder your driving at all so all is good. That was an easy one.
I notice you have a drop pitman arm on their too. Do you have any bump steer? I had some that I could not get rid of and after reading on this forum that you really don't need or want it on a TJ, I took mine off and put the OEM back on. Much Better. I did the same to my son's TJ and his was even a bigger, better difference. I can also see that you don't have an adjustable front track bar and that the original installer just drilled a new hole for the track bar. I would start saving for a high quality adjustable track bar so you can move back to the factory mount and I suspect with a 6" lift the track bar is not centering the axle correctly. The rear track bar is pretty much the same...it really is better if it's adjustable so you can make sure your axle is centered. A lot of steering issues can be resolved by making sure your axles are centered and as you can afford to....upgrade and get the setup in balance front and rear. You will notice the rear being off if you go around a corner and one side (usually the passenger) feels like it wants to come around on you. You can see how far your axle is off from center by measuring from the edge of the tire tread...either edge...to a spot on the frame. Then go to the other side and do the same making sure you are picking a spot on the tire and the frame that is almost the same spot but reversed. If you are off by more than half an inch, you may need centering.
It's always something...
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Old 03-15-2011, 01:56 PM   #7
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Thanks for all the insights. I just bought this ride and am looking forward to making it mine and the customization. I will look into centering the axles and the pitman arm. I want to make sure that there wasn't a major issue before I went off roading with it.

A better look at the Rubi


The original owner kept the Front and Rear Bumpers, returned them to the stock setup.
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Old 03-15-2011, 02:28 PM   #8
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Also, yes I do have some bump steer. I thought it was because of the lift, but now I know what I have to do to correct it, Thanks!

Do you have any suggestions of a good brand for the adjustable track bar?
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Old 03-15-2011, 04:34 PM   #9
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Old 05-31-2011, 10:24 PM   #10
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Did your bump steer go away with a OEM pitman arm? I just bought a TJ and have very bad bump steer.
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Old 06-02-2011, 09:33 PM   #11
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you sure it is a 6" lift if so 35's no problem,
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Old 06-04-2011, 10:24 PM   #12
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if it 4 inch lift or 6 inch lift u can put 35 on it it will work i seen alot jeep all over my area
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Old 06-11-2011, 02:20 AM   #13
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Did anyone tell him how to figure out how much lift he has? Need to know what to measure here
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Old 06-11-2011, 09:12 AM   #14
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wow, that rig is setup terribly.

I'd suggest starting over...seriously. You've got a typical cheapo lift sold to suckers.

What you need to make it work:
1. remove the drop pitman arm
2. new control arms - yours are fixed length with poly bushings at both ends. these are absolute crap and known to rip control arm mounts off the axle. these are likely your popping issue too.
3. you have no bumpstop extensions. you need to determine the bumpstop extension length required to prevent damaging your shocks and shock mounts. this is determined by the compressed shock lengths front and rear.
4. your brake lines are stock - way too short for the lift & longer shocks. you need new extended front brake lines.
5. stock tie-rod - needs upgraded to turn larger tires. get a V8 ZJ tie-rod or the Currie setup.
6. stock track bar is inadequete for that lift height. you need an aftermarket track bar. i'd suggest the Currie TJS or TJJ models since they both require the least amount of bumpstop extensions - 2". this gives you the best chance of maintaining uptravel after determining the bumpstop extension you need for the front shocks. problem is whoever installed the lift redrilled the track bar hole and didn't reinforce it. you'll need to weld some place over the axle side bracket to reinforce it, and install the new track bar.
7. there is a transfer case drop, which isn't ideal at all. you need a CV shaft.
8. adjustable control arms on the lower & upper rear and lower front will allow you to adjust caster and pinion angle for the CV shaft. based on the lift height and fixed lower control arms you have now, i suspect the caster & aligment isn't great.

You need to figure all of the above out before thinking about 35" tires.

here's some reading:
http://www.wranglerforum.com/f5/corr...gth-70047.html
http://www.jeepforum.com/forum/f9/bu...points-734737/
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Old 09-14-2011, 07:40 PM   #15
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Thanks for all the insights. I have been working on it little by little and will take all the help I can get. Also, I have resolved the bump steer. Sorry for the delayed response, I've been having problems accessing the forum(resolved now).
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Old 09-15-2011, 09:40 PM   #16
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What resolved your bump steer?
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Old 09-19-2011, 11:36 AM   #17
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I was able to correct the bump steer by replacing the factory track bar with a adj. track bar and then having it aligned and the tires rebalanced.
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Old 09-26-2011, 08:13 PM   #18
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You did not have to replace the drop down pitman arm. I have heard that a TJ did not need a drop down pitman arm. I guess I will just check with the 4wd shop and see what they recommend. Thanks
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Old 09-26-2011, 08:17 PM   #19
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I've gone back to a stock pitman arm, even though I lifted the TJ.

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