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Deville 03
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177 Posts
Discussion Starter #1
While drivin on the highway my car starts to vibrate almost to the sense of a heartbeat , off n on every other second! I'll feel a lil rumble, then stop thru the gas pedal but crazily if I go bout 77 it will start to fade!!! I usually just stay at 67 so I can barely feel it n not get a speeding ticket either lol! Any help, I was thinkin wheel balance but I've had one within the last 3 mos! I thought I only need a wh balance if I get a tire on the rim , not just takin the wheel off to do the brakes or anything which is the only time I've taken it off! Thx for the help!
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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68,489 Posts
Are all 4 tires the same make, model, age ? Extremely small tire wear differences can cause harmonic vibration nodes. Make sure that all the lug nuts are torqued to 100 lb/ft in a star sequence on all 4 wheels. Try to set pressures to 32 psi, cold, on all 4 tires. Use a good dial gauge and don't check/adjust pressures with the tires warm or hot.
 

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White Diamond '03 DHS (with DTS floor shift)
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86,788 Posts
Don't overlook a bad (front) motor mount.

"Technically" the Deville calls for 30 psi, but that should not make any difference.
 

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2011 CTS Coupe FE3, 2003 Thunderbird, Gone 2013 ATS, 02 Deville
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1,334 Posts
I had similar issue, had about 35,000 miles on tires when the vibration began. had always rotated and balanced them, and they had plenty of tread remaining. all new shocks and struts too. tire shop could not get rid of vibration at 74MPH, finally at 40,000 miles I put 4 new tires on, problem solved.
 

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Deville 03
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177 Posts
Discussion Starter #6
I just came from mr tire, supposedly my left from tire is dry rotted n the rt front was driven on a flat! But the treads are still good so I'm wondering the sidewall being rode on affects the performance! Oh yea n there vogues , I know how u all feel bout then but I love the look! Not the price but the look lol! That's y I'm inquiring about there info before I spent 250+ on one tire!
 

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1991 Cadillac Sedan deVille
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591 Posts
Random engine misfires can be transmitted in the form of vibrations through the locked up VCC at highway speeds. Have you checked for codes?
 

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2011 CTS Coupe FE3, 2003 Thunderbird, Gone 2013 ATS, 02 Deville
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1,334 Posts
I am no tire expert, but driving on a flat may have caused the steel cords to break. that will cause the tire to vibrate. I have had these problems in the past, tire looks great and balance on machine is good but has vibration when on car. problem is cord inside tire has broken.
 
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