66 coupe vibration

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  • Joe Clarino

    #1

    66 coupe vibration

    I have a 66 coupe apun excelleration has a vibration in the front to middle of the car. I have replaced the tires and had it aligned with no results. It feels as if it is a broken trans mount( It's Fine) or an unbalanced driveshaft. Has anyone experienced this or have any ideas what it could be?
    Thank you
    Joe
  • Wayne K.
    Expired
    • December 1, 1999
    • 1030

    #2
    Re: 66 coupe vibration

    Joe,

    Have you checked the motor mounts ?

    Comment

    • Wayne C.
      Infrequent User
      • November 1, 1978
      • 0

      #3
      Re: 66 coupe vibration

      Also, check the front differential mount cushion.

      Comment

      • John M.
        Expired
        • January 1, 1998
        • 813

        #4
        Re: 66 coupe vibration

        Also, check the play in the transmission rear yoke/bushing. I've had this problem with the same symptoms. Good luck.

        Comment

        • Joe Clarino

          #5
          Re: 66 coupe vibration

          Yes I have. No Problem.
          Thanks

          Comment

          • Jeffrey S.
            Extremely Frequent Poster
            • June 1, 1988
            • 1826

            #6
            Re: 66 coupe vibration

            Joe
            I had a similar problem on my 69 many rears ago except that the vibration only occured over 3500 RPM. The culprit turned out to be a bad fan clutch. At that time I replaced the original fan clutch (which I saved and had restored a couple of years ago)and fan with new GM units. The problem was solved. Many years later I had the original rebuilt and restored and re-installed the original fan and everything works beautifully.
            Hope this helps.
            Jeff Salz

            Comment

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