C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Vibration problem in my 90

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Old Jun 9, 2002 | 12:37 AM
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From: sharpsburg GA
Default Vibration problem in my 90

My 90 has a vibration (shimmy) that comes in at about 75 mph. It is hard to tell were it starts, but it runs through the whole car. I can't tell if it is coming from the drive train or through the front end. So far I have rebalanced all four wheels and changed the main drive shaft u-joints. I also have brand new tires. Just wondering if there is any common problems with the 90 for this type of vibration. What would you check next?
Thanks .
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Old Jun 9, 2002 | 12:57 AM
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From: Manhattan
Default Re: Vibration problem in my 90 (bdtenore)

where do you feel the vibreation? is it the steering wheel? the seat? very generally if you feel it in the wheel, it's the tires; if you feel it in the seat, it's the drive train. does the speed where it vibrates change? if it's the wheels, sometimes the speed where it starts to vibrate will change because when you go around turns the outside wheel turns faster than the inside. you can also swap the wheels front to rear to see if it lessons the vibration; unballenced wheels up front are more noticeable than the rear wheels.
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Old Jun 9, 2002 | 09:06 AM
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89 Bob L
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From: Orangeburg, NY
Default Re: Vibration problem in my 90 (bdtenore)

Did you check the ball joints and control arms?
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Old Jun 9, 2002 | 11:16 AM
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From: Are you the bug or are you the windshield.....
Default Re: Vibration problem in my 90 (bdtenore)

Could also be a warped brake rotor..... Need to determine if you have any other brake problems.......
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Old Jun 9, 2002 | 09:19 PM
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From: sharpsburg GA
Default Re: Vibration problem in my 90 (bdtenore)

Checked the front end today, everything is tight. Moved the front tires to the back and back to the front. See what happens on the way to work tomorrow. By the way, most of the vibration is comming through the steering wheel.
Thanks.
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