I Need Some Help - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Problems and Service Talk about any mechanical problems you are having

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post #1 of 20 (permalink) Old 02-04-2012, 09:57 AM Thread Starter
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Unhappy I Need Some Help

i have a 2008 cobalt special edition with 40 thousand miles, my problem is that when i exceed past 50 mph until 70 mph the steering wheel shakes and gets worse when i get on the brakes but once the speed drops below 50 it stops, ive changed front rotors and brakes and all i can get from mechanics is that i have worped rotors which cant be true if i put new ones on and it did the very same thing as soon as i drove it out of my shop. Any thoughts on the subject would be greatly helpfull.
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post #2 of 20 (permalink) Old 02-04-2012, 10:31 AM
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Classic symptoms of an alignment issue. Get it fixed quick because you will wear your tires unevenly and be forced to buy new sooner than later. I purchase the 3yr plan at my local Tires Plus for $170 and any time I take the car apart or every 10k (I commute for work) I get it realligned. Probably a bit much but at least I know I'm drving straight.
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post #3 of 20 (permalink) Old 02-04-2012, 10:41 AM
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Sounds like you might have a broken belt in one of your tires or you might have lost a balance weight. Bent rim will also manifest itself the way you describe, hit a curb lately or a real bad pothole?

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post #4 of 20 (permalink) Old 02-04-2012, 12:57 PM Thread Starter
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the tires are brand new and i just had the alignment done, this is why im at a loss right now... I have a buddy that thinks its something to do with the abs system or something along those lines so i'm curious of your guy's thoughts on this
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post #5 of 20 (permalink) Old 02-04-2012, 12:59 PM
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Is it a small shake or a violent one?
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post #6 of 20 (permalink) Old 02-04-2012, 05:17 PM Thread Starter
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It's a small shake while driving but between those speeds if I get on the brakes its a rather vigorous shake but the car dosent pull any while I'm on the brakes
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post #7 of 20 (permalink) Old 02-04-2012, 05:47 PM
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post #8 of 20 (permalink) Old 02-04-2012, 06:41 PM
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New tires doesn't mean they're good. I even had an out of round brand new Michelin "X" once. Get them roll tested.

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post #9 of 20 (permalink) Old 02-04-2012, 07:20 PM
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you lug nuts tight? that can cause that issue

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post #10 of 20 (permalink) Old 02-05-2012, 03:05 PM Thread Starter
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lugs are tight, tires are good with the roll test
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