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Old 06-19-2010, 10:44 PM   #1
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Lift noise

Okay,

I have a '98 TJ 4.0 5 speed standard 4.0 with 31's on factory Jeep rims and just installed a 2.5 " Rough Country suspension lift and the transfer case drop kit and new front steering damper.

2 questions:

1) I have a wobble between 40-50 MPH but otherwise it's smooth. Was just a small wobble I was planning on getting an alignment and see what happened. Now today, I feel a vibration/knock under the driver side floor board between 40-50MPH. I can actually feel something under the drivers side floor board as if it's hitting but nothing is, what could this be? Is this a u-joint problem??

2) With this lift installed, I'm still experiencing tire rub especially when backing up and turning with this lift. I thought this would resolve the problem especially since I'm running stock Jeep rims... What do you suggest?

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Old 06-19-2010, 10:49 PM   #2
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If your springs are the original ones, they may be shot and sagged way too much. This might be the issue with the rubbing.

As for the sounds... Make sure that all the bolts for the t-case drop are tight and not working loose. Do you hear this sound constantly at speed or is it only during acceleration?

The wobble will more than likely be cured by the alignment.

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Old 06-19-2010, 10:53 PM   #3
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Springs were replaced with the lift, the sounds are only between 40-50 MPH, no other times. Checked the bolts tonight and all are good, only thing I left out is the very front passenger side when I went to put the bolt and spacer in for the drop, the bolt would not tighten at all, so I left it out. Drove it after wards several times and didn't make this noise until about 5 days later.
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Old 06-19-2010, 10:54 PM   #4
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What does it sound like? A chirping or clunk?
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Old 06-20-2010, 01:29 AM   #5
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The rubbing may be cured with new wheels with a 4-5 BS. I believe with that lift and 31's you need a 4 BS.
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Old 06-20-2010, 06:55 AM   #6
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I lifted mine about a month ago and got bad death wobble. Alignment fixed most of it but tightening my front track bar did the most good. I have had to go back and re-tighten it a few weeks after doing the lift.
I agree the rubbing may be a rim issue and not your clearance. Are you rubbing on your fenders or is it on the sway-bar and control arms. I am running 32's on stock rims and mine rub on my quick disconnects.
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Old 06-20-2010, 08:08 AM   #7
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You need to check the track bar. Make sure that the axle end is torqued to spec. The sound is the frame side binding and letting go. Tighten the track bar bolt before going anywhere else.
Did you align it after you did the lift? If you can install a lift, you can do an alignment. Couple of wrenches, vise grips and a tape measure is what you need. Center the steering wheel and set the toe, it takes less than an hour.
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Old 06-20-2010, 10:23 AM   #8
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Quote:
Originally Posted by AzTJ View Post
What does it sound like? A chirping or clunk?
More of a clunking sound. I can feel it under the driver side floor board as if something is hitting the floor boards but it's not.

I haven't done an alignment since installing the lift but will do so as well as the front track bar.

I believe it's rubbing on the control arms.
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Old 06-20-2010, 10:45 AM   #9
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Check your track bar and see that it isn't hitting the punkin on your front differential.

You'll know if it is or not by looking for scuffed paint on either of them.
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Old 06-20-2010, 05:30 PM   #10
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I am certain it is the track bar. Go tighten the axle end! The reason you feel it when turning/changing direction is because the axle is moving from side to side because the track bar is not tight at the axle mount. This will continue to loosen until the nut drops off and the bolt comes out. Then the track bar will drop allowing uncontrolled lateral movement of your axle. You will crash shortly thereafter. If I am wrong, oh well. At least you won't crash because of it.
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Old 06-20-2010, 06:49 PM   #11
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Quote:
Originally Posted by D51_06TJ View Post
I am certain it is the track bar. Go tighten the axle end! The reason you feel it when turning/changing direction is because the axle is moving from side to side because the track bar is not tight at the axle mount. This will continue to loosen until the nut drops off and the bolt comes out. Then the track bar will drop allowing uncontrolled lateral movement of your axle. You will crash shortly thereafter. If I am wrong, oh well. At least you won't crash because of it.
D
^^^^ Amen! Go check the easy stuff... worst that could happen is that you are now sure stuff is tight...
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Old 06-27-2010, 07:17 PM   #12
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Okay, I checked the track bar and it was tight. I didn't take a ratchet to it but I yanked the crap out of it and got no play side to side or up and down. I did tighten the bolts for the transfer case lowering kit in hopes this might be some of the problem?

Now problem 2 arose:

I put the second part of my lift on which is a 1.25 inch body lift. Now I can't shift to anything other than first and with a little massaging, reverse! Tell me there has to be an adjustment for the shift linkage???? Because of this, I can't drive it to see if problem 1 is solved...
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Old 06-28-2010, 07:02 AM   #13
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Take a deep breath YES it's a simple adjustment. Happens all the time with body lifts.
Did your lift come with a transfer case drop?

If so, did it come with a linkage bracket?
Here's a link that may be helpful to you.
Scroll down to page 3.

http://www.roughcountry.com/install/1157.pdf

Any time you get in a pickle with something from Rough Country, you can give them a call and they will walk you through it. Good folks up there.
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Old 06-28-2010, 01:50 PM   #14
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Yup, came with transfer case drop and I installed the shifter linkage bracket yesterday. That solved the 4wd problem, just trying to get the transmission to shift right now.

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