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Old 02-06-2013, 08:17 PM   #1
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Clunks from rear suspension?

Coming down a steep hill onto road. Made sharp right turn from hill, the LJ made a loud clunk from the rear. Now on most turns I get a CLUNK from the rear.

Crawled under, my guess was a rear sway bar link. Nope. Shocks ok. Springs look intact. Bushings look good.

Need to jack up tomorrow, any troubleshooting suggestions. Could hard turn make axle differential problems?

2004 LJ 98,000 miles.

Thanks,

dc

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Old 02-07-2013, 01:04 AM   #2
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If you have a drop bracket for the rear swaybar, check to see if it is loose. If it is, temporarily tighten the fastener to make sure that was it, then have the thing welded on so it won't come loose again.

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Old 02-07-2013, 07:05 AM   #3
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You don't need to set it on jack stands or put it on a lift to duplicate the noise. Have someone rock the Jeep while you're under it. If that doesn't do it, have that same person push back and forth on the tires while the Jeep is in park (or in gear) to load the control arms and expose slop. You should be able to find the culprit that way. The stock rear sway bar links are notorious for being clunky POS's.
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Old 02-07-2013, 09:35 AM   #4
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I'm having a similar issue in my jeep... Imped mentioned that the stock rear sway bars are a clunky POS, my question is:

Is the clunking bad for the jeep? Or just an annoyance...
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Old 02-07-2013, 10:08 AM   #5
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Not my first post as my old account is gone.. My 2006 Jeep has the same issue. I have had it for about 3 years now and nothing has came about from it. I am planning on taking it in soon because it's quite loud when I pull into my driveway
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Old 02-07-2013, 10:19 AM   #6
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Quote:
Originally Posted by cballou View Post
I'm having a similar issue in my jeep... Imped mentioned that the stock rear sway bars are a clunky POS, my question is:

Is the clunking bad for the jeep? Or just an annoyance...
The sway bar is fine. The sway bar links are likely a culprit. They're plastic and the soft bushings constantly deflect and start to wallow out. The clunking you hear is the loose bushing against their respective bolts. It's not 'bad' for the Jeep but any play in the sway bar system results in a delay between the input (action) and output (reaction) of the sway bar, slowing its ability to dampen the roll force.
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Originally Posted by ha1o2sirfer View Post
Not my first post as my old account is gone.. My 2006 Jeep has the same issue. I have had it for about 3 years now and nothing has came about from it. I am planning on taking it in soon because it's quite loud when I pull into my driveway
Get under the Jeep and find it. Get replacement parts, install them. Easy as that, no reason to rely on someone else.
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Old 02-07-2013, 10:23 AM   #7
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Quote:
Originally Posted by Imped
The sway bar is fine. The sway bar links are likely a culprit. They're plastic and the soft bushings constantly deflect and start to wallow out. The clunking you hear is the loose bushing against their respective bolts. It's not 'bad' for the Jeep but any play in the sway bar system results in a delay between the input (action) and output (reaction) of the sway bar, slowing its ability to dampen the roll force.

Get under the Jeep and find it. Get replacement parts, install them. Easy as that, no reason to rely on someone else.
It literally takes 10-15 minutes to R&R both rear sway bar links.
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Old 02-07-2013, 10:42 AM   #8
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Shocks are too long for the bump stops and bottoming out? A bump stop fell out & letting a shock bottom out? I only bring them up since other possibilities have already been suggested.
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Old 02-07-2013, 07:15 PM   #9
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Looked some more. Rear sway bar link bushings are ok, but the link can be moved. I drove it in circles just to rule out differential. Noise occurs mostly on right turns. I can rock the jeep and make clunk. Will get someone to rock it this weekend, hopefully it will be evident.

Thanks,

dc
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Old 02-08-2013, 09:23 PM   #10
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Had a mystery clunk in the back of my "99. Found out why it's important to torque your control arm bolts with the vehicle weight on them. When it went full flex it turned the factory nut-on-a-stick 1/4 turn. Couldn't believe that just a 1/4 made that much of a difference
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Old 02-08-2013, 11:51 PM   #11
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Quote:
Originally Posted by DCSCO View Post
Looked some more. Rear sway bar link bushings are ok, but the link can be moved. I drove it in circles just to rule out differential. Noise occurs mostly on right turns. I can rock the jeep and make clunk. Will get someone to rock it this weekend, hopefully it will be evident.

Thanks,

dc
This just happened to me. I was hearing a clunk when taking off and going over like speed bumps. I was able to put it in gear w/o the parking brake on level ground, rock the Jeep and found the problem.

It was the lower control arm bushing bolts that came loose (not much) just enough to feel it. After that, all was quiet underneath. Will be buying new bushings here shortly.
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Old 02-10-2013, 08:44 PM   #12
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Thanks for the reply's all. Got someone to move the body while I looked underneath. Found the front sway bar link on the passenger side separated. Repaired in an hour.

Would have sworn the noise was rearward.
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Old 03-22-2013, 07:08 PM   #13
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I was able to figure out that my rear sway bar is quite loose. When I'm under the jeep I can slide it a good 1/4 in either way. Would tightening the bolts on the mount help or should I simply replace the mounts?
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Old 09-30-2013, 10:12 PM   #14
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Quote:
Originally Posted by DCSCO View Post
Thanks for the reply's all. Got someone to move the body while I looked underneath. Found the front sway bar link on the passenger side separated. Repaired in an hour.

Would have sworn the noise was rearward.
I need to get under there and take a peek. I have a clank that I think is in the rear... I'll start checking the front.

Had the clank up front ~10K miles ago but still under warrnty so had the dealer deal with it... It was a upper shock grommet... The mechanic said he has done MANY OF THESE. hmmm, I'll call and ask service too....

Thanks

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