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post #1 of (permalink) Old 4 Weeks Ago Thread Starter
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Rotational thumping from driver front

Please help me figure this out. I have replaced my cv axles, wheel hubs, tie rods, rotors and pads, sway bar mounts, and sway bar end links. I still have this thumping at all speeds from 10mph plus that is definitely rotational and coming from the front driver side. I swapped wheels to make sure that it wasn't a flat spot and nothing changed. The car can drift a little on the highway but not bad and it drives relatively straight. Could it still just be alignment because i havent done one since all that work. I was told it could even be a shock but i have a hard time believing that. Anyone that can think of something let me know. Thanks.
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post #2 of (permalink) Old 4 Weeks Ago Thread Starter
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I forgot to mention the mileage. Its a 2008 chevy impala ls 3.5l ff with 79k
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post #3 of (permalink) Old 4 Weeks Ago
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Quote:
Originally Posted by Squanchyct08 View Post
Please help me figure this out. I have replaced my cv axles, wheel hubs, tie rods, rotors and pads, sway bar mounts, and sway bar end links. I still have this thumping at all speeds from 10mph plus that is definitely rotational and coming from the front driver side. I swapped wheels to make sure that it wasn't a flat spot and nothing changed. The car can drift a little on the highway but not bad and it drives relatively straight. Could it still just be alignment because i havent done one since all that work. I was told it could even be a shock but i have a hard time believing that. Anyone that can think of something let me know. Thanks.
You've thought of just about everything it could be.

One more thing to consider, could it be a loose plastic panel flapping in the breeze? I could see one of those flapping with a frequency which varied with air flow speed, sounding like a flat spot on a tire.

Another thought is an alignment issue whereby the toe is out and the contact patch of the tire moves in (or out) until it reaches its limit, then snaps back. It's a bit far fetched, but there aren't many things left to consider.

You might go back to moving tires around. A thump might still sound the same even if moved on the same side or same end. You might want to try using the spare and moving it around. Have you jacked it up and hand turned the tires looking for a flat or high spot? That might help pinpoint which tire to focus on.

HTH.

Doug

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post #4 of (permalink) Old 4 Weeks Ago Thread Starter
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Thanks for the advice. Im actually leaning towards the alignment with major tow out because you feel it in the car and hear it.
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^+1. If you r&r'd the tie rod(s), inner or outer, you definitely need an alignment.
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You have struts on the 2008 Impala. They have mounts and bearings on the top of the strut. When wore out they will make that thumping sound when you hit a small bump, cross a railroad crossing, etc. . Check Rock Auto it will show a picture of the part. https://www.rockauto.com/en/moreinfo...40297&jsn=1085
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Originally Posted by camarodriver67 View Post
You have struts on the 2008 Impala. They have mounts and bearings on the top of the strut. When wore out they will make that thumping sound when you hit a small bump, cross a railroad crossing, etc. . Check Rock Auto it will show a picture of the part. https://www.rockauto.com/en/moreinfo...40297&jsn=1085
I did an alignment and it helped kind od, but the issue really didnt go away. Would believe it was struts too but even smooth flat road it does it. The sound is definitely related to something rotating in the driveline with resistance at one part of the rotation, I asked a shop to give it a drive and he said it had to get worse to figure it out but also it could be something transmission related? This is driving me nuts because the rest of the car is solid besides this problem. No rust or anything. I am trying to figure out if i can record the problem and post it, but i dont think its loud enough at all.
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Btw thanks everyone for trying to help already or in future
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Quote:
Originally Posted by sheila View Post
^+1. If you r&r'd the tie rod(s), inner or outer, you definitely need an alignment.
i tried an alignment and while the handling improved (alignment was really out and i knew that but was lazy) the issue didnt change😑☹️
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