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Thread: Bad Vibrations

  1. #16
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    If you ease on or off the gas and it dissapears , it could be symptomatic of a bad universal on the prop as easing off and applying gas will load the universal and thus take up some play.
    Easy way to check is if the car clunks at all when putting it into gear if its an auto. If its a bad universal on a 1/2 shaft , you would generally hear a ticking sound.

  2. #17
    Member howard's Avatar
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    I have a vibration at cruise speed that will make the steering wheel shake.
    sounds like wheel balance to me...try swapping wheels front to rear
    Could be bad tire, unbalanced wheel/tire

    Drivetrain vibration would be felt in the seat of your pants

  3. #18
    Bad Vibrations Copdogcorvettes's Avatar
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    Hi Everyone,

    I thank you all for your help. I found the problem: U-joints bad on the drive-line and a minor balance one tire. The pulling to the left was due to the left rear brake flex line was bad, holding pressure on the brake.

    I've got it all fixed now but for the u-joints. At least I know what the problem is and just have to find a little more free time to get them replaced.

    Again Thank you all for your help.

    Gary

    SAVE the WAVE

  4. #19
    Member Rebelrob's Avatar
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    Hi, which U joint. Im not an expert, but arent their several U joints?
    My shakes a little as well between 70--75 mph... the tires are over 10 yrs old and its sat for a while.

  5. #20
    Bad Vibrations Copdogcorvettes's Avatar
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    Quote Originally Posted by Rebelrob View Post
    Hi, which U joint. Im not an expert, but arent their several U joints?
    My shakes a little as well between 70--75 mph... the tires are over 10 yrs old and its sat for a while.
    It's the drive shaft u-joints; which there are two. One front and one rear. There are 2 each on the half shafts for a total of 4 on the half shafts.

    Sound like yours is most likely a tire balance problem. Luckily that is easy to fix and doesn't cost much.

    Gary

  6. #21
    Member Rebelrob's Avatar
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    OK, what happens to the u joints? do they bend or break?
    How many miles do you think you have on those u joints and shafts?



    Quote Originally Posted by Copdogcorvettes View Post
    It's the drive shaft u-joints; which there are two. One front and one rear. There are 2 each on the half shafts for a total of 4 on the half shafts.

    Sound like yours is most likely a tire balance problem. Luckily that is easy to fix and doesn't cost much.

    Gary

  7. #22
    Bad Vibrations Copdogcorvettes's Avatar
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    U-joints have needle bearing & greese to keep them lubicated. The gease can dry out, the needle bearing wear out. How long they last depends on many thing: if they are lubed reguarly, if so fitted; abuse is one of the biggest thing. Auto seem to be easier on them than manual trans. car. High HP and hard shifts make them wear fast.

    The u-joint can break an ear off or a cap. Either way the drive-line can come lose: At 2k-5k RPM the drive line flupping around lose under the car IS NOT GOOD. Hope this helps in some way.

    Gary

    SAVE the WAVE

  8. #23
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    Thanks. I am going to have it on a lift this week at my friends house.
    Is there something I can check on them to see if they worn. Maybe any play/slop/wiggle. Just wondering what to look and feel for.

    Thanks,

    R


    Quote Originally Posted by Copdogcorvettes View Post
    U-joints have needle bearing & greese to keep them lubicated. The gease can dry out, the needle bearing wear out. How long they last depends on many thing: if they are lubed reguarly, if so fitted; abuse is one of the biggest thing. Auto seem to be easier on them than manual trans. car. High HP and hard shifts make them wear fast.

    The u-joint can break an ear off or a cap. Either way the drive-line can come lose: At 2k-5k RPM the drive line flupping around lose under the car IS NOT GOOD. Hope this helps in some way.

    Gary

    SAVE the WAVE

  9. #24
    Bad Vibrations Copdogcorvettes's Avatar
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    Quote Originally Posted by Rebelrob View Post
    Thanks. I am going to have it on a lift this week at my friends house.
    Is there something I can check on them to see if they worn. Maybe any play/slop/wiggle. Just wondering what to look and feel for.

    Thanks,

    R
    Check for a lot of gease around the caps. Then fell for any twist or movement up-down, side to side. There should not be any give at all.

    Good luck with the check, but I still think your vibration is tire balance. But,I've been wrong before. U-joints cost $20 - $30 each plus installation if you can't do it yourself.

    Gary

    SAVE the WAVE

  10. #25
    Member Tntruckguy's Avatar
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    Default vibration

    I think evolution1980 is on the right track. I had that same problem with my 80 when I first got it. I did re-balance the wheels and it helped some but the problem went completely away when I had the steering and some worn out front suspension parts replaced. I had a corvette specialist do the work instead of my regular mechanic. It now feels comfortable to drive over speeds of what the stock speedometer reads. I wanted a heavy wheel and the guy who did the steering and front suspension set me up perfect. Oh, don't forget to have the front end aligned. Spare no expense, these things are like racing skateboards at 100mph, one little shake or shimming, your off in the ditch!

    Good luck!

    tntruckguy

  11. #26
    Administrator Evolution1980's Avatar
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    Quote Originally Posted by Tntruckguy View Post
    I think evolution1980 is on the right track.
    Nah, I didn't win the prize. He stated up in post #17 that it was u-joints and a wheel balance issue.

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