Clunk on bumps - Jeep Commander Forums: Jeep Commander Forum
Suspension / Lifts This is the place to discuss the suspension, lift systems, and other stuff underneath your Jeep Commander

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post #1 of 23 (permalink) Old 04-01-2019, 04:44 PM Thread Starter
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Clunk on bumps

Does anyone else have a clunk/thud sound on the front suspension when you hit a bump or small pot hole or even driveway approach. I have had it since I bought it and thought when I replaced the struts it would go away. Being a mechanical minded person it sounds like a strut mount is loose or broken which is not the case. I do not believe it is the diff mount because it looks good and I don't think it would sound like that hitting a bump on both sides of the car because you can definitely tell which side of the car it is when you hit the bump


Any ideas??????
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post #2 of 23 (permalink) Old 04-01-2019, 06:19 PM
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Originally Posted by theturboman View Post
Does anyone else have a clunk/thud sound on the front suspension when you hit a bump or small pot hole or even driveway approach. I have had it since I bought it and thought when I replaced the struts it would go away. Being a mechanical minded person it sounds like a strut mount is loose or broken which is not the case. I do not believe it is the diff mount because it looks good and I don't think it would sound like that hitting a bump on both sides of the car because you can definitely tell which side of the car it is when you hit the bump

Any ideas??????
@theturboman;

If you used the advanced search feature on the forum under the "Tools" tab, you'd literally find 100 other threads with the same or very similar titles....now we have 101....LOL.

First thing I'd get checked is your front upper differential bushing; a very common & well known point of failure on Commanders and Grand Cherokees alike, that will cause clunks up front, when you hit bumps.

All joking aside though - try the forum's advanced search feature under the Tools tab next time. You'll be surprised how quick, easy & informative it is. Once you go to the Tools tab, you'll see search by key words; Once you put your key words in, there is another drop down menu right underneath it where you can select either "search entire posts" - or "search thread titles only"; Whichever way you want to search is up to you;

I usually search by thread title only but it's up to you, whatever your preference is.


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Last edited by Big Blue; 04-01-2019 at 06:28 PM.
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post #3 of 23 (permalink) Old 04-02-2019, 05:28 AM
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I would look at the front sway bar bushings, solved my problem years ago and has not returned.
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post #4 of 23 (permalink) Old 04-02-2019, 06:52 AM
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I would look at the front sway bar bushings, solved my problem years ago and has not returned.
What he said, fixed mine also, and very cheap and easy.

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post #5 of 23 (permalink) Old 04-02-2019, 12:33 PM
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Took one of mine to NAPA and was told it looked good, replaced them anyway and problem solved and as mentioned very cheap.
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post #6 of 23 (permalink) Old 04-03-2019, 06:07 AM
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I've replaced the front diff bushings and all of the sway bar bushings. My front sway bar bushings only lasted two years and 35K miles. Just replaced them again clunk gone. These vehicles are known to be tough on the sway bar bushings. Front and rear struts/shocks also replaced.
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post #7 of 23 (permalink) Old 04-03-2019, 11:18 AM
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Originally Posted by quickster2 View Post
I've replaced the front diff bushings and all of the sway bar bushings. My front sway bar bushings only lasted two years and 35K miles. Just replaced them again clunk gone. These vehicles are known to be tough on the sway bar bushings. Front and rear struts/shocks also replaced.
Have you tried different brands of sway bar bushings? I've heard good things about Moog's bushings, though I haven't tried them since I'd need to order the newer bushing bracket.

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post #8 of 23 (permalink) Old 04-03-2019, 12:43 PM Thread Starter
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I read back on some of the other threads so I disconnected the sway bar of the lower control arms, removed the links and the noise is still there

So far new struts, springs, insect spring pocket insulators,replaced upper arms, inspect upper diff mount-- noise still there
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post #9 of 23 (permalink) Old 04-03-2019, 04:26 PM
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have you checked your steering rack? there is a reverse torx head bolt that you can turn to tighten slop out...
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post #10 of 23 (permalink) Old 04-03-2019, 05:24 PM
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i used the Moogs Very happy
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