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

Viberation

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Old Dec 23, 2010 | 12:01 PM
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We have a 1993 40th and it viberates around 70. If you let off it smooths out. Any idea whats wrong. The car runs smooth until you feel the viberations.
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Old Dec 23, 2010 | 12:24 PM
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Originally Posted by Pete K
Not enough info provided for anything other than a guess.
Take it for a ride, find the spot it vibrates the worst. Then shift to neutral. See if the vibration goes away, gets better, stays the same, or is worse.
That may help pinpoint it a bit.
.......but my best guess with the information provided is bad u-joints on the half shafts.

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Old Dec 23, 2010 | 03:03 PM
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Did the vibration start suddenly or develop over time? Can you pinpoint front or rear? As suggested, try steady 70, gentle acceleration, and overrun to see if there is any change. Vibration at this speed can be caused by tires ( out of balance or belt delamination) as well as u-joints.
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Old Dec 23, 2010 | 10:37 PM
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Need more info.When did this problem start?Any work done before this problem surfaced?Tires in good shape?Have they been balanced recently?How long you had the car?Answer petes questions too.If I had to guess I would say u-joints
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