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Old 02-10-2011, 09:17 AM
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Exclamation Rear axle noise!?! Thoughts please...06' lj

Just bought an 06' Unlimited and within a day started hearing knocking noises from the rear end. When the Jeep starts swaying back and forth laterally while driving on rough, uneven terrain you can not only hear it you can feel it in your seat. It cannot be heard under load, or when driving up rough hills. But coasting or under braking, decending the same damn hill, it bangs like crazy. I can recreate the noise while parked by pushing on the rear quarter panel. It's not a loose spare or loose lugs! I jacked it up at the pumpkin and was able to make the wheel move in and out, recreating the sound. After removing the wheel, I could do the same with the brake assembly. Everything felt tight and seemed to be in good shape with shocks, springs, sway bar and bushings. I'm worried it may be something in the differential. I hope its just a matter of turning a wrench and tightening something. She's a 2006 with 34K mi, light offroad work and only one owner. Any suggestions?

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Old 02-10-2011, 09:28 AM   #2
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Get under the jeep and have someone rock it like you describe and look for movement in the control arms. Take a close look at your rear track bar as I suspect that may be where the problem is. There should be NO play in the bushings! If there is you will need to change bushings or go for aftermarket replacement parts.

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Old 02-11-2011, 06:13 PM
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Thanks TexasT! Put her on a lift at the local shop today and the mechanic hit on the track bar right away. I didn't really see much movement myself, but then again there was no load on it at the time. He recommended replacing the shocks also. Ordered some replacement bushings for a minimal cost and some Skyjacker Hydro shocks from our friends at Quadratec. Hopefully this will not only solve the prob., but give her a better ride. I appreciate the input.
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