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Vibration in park

Discussion in ''Da Nailhead' started by staged67gspwr, Mar 7, 2002.

  1. staged67gspwr

    staged67gspwr "The Black Widow"

    Hi,i am looking to get a 66 GS this guy is selling but there is a problem he cant figure out either,he told me they rebuilt the motor in it and all,but after they had switched from the ST300 to a ST 400 it has a nasty vibration problem at certain rpm`s,what can that be?

    Thanks
    George

    :confused:
     
  2. Mark Ascher

    Mark Ascher 65GS.com

    Check the Flexplate

    The nailheads are externally balanced, so if they have swapped flexplates around, there might be a problem with that. That's the first thing I would check.

    Mark
     
  3. Adam Whitman

    Adam Whitman Guest

    George,
    I thought I replied to this yeaterday, but must have hit the wrong button someplace...:Do No:

    The nailheads can have the flywheel "timed" 6 different ways. Chances are they bolted the flexplate on in the wrong position. I believe there is a hole that you line up to get it in the right spot.

    I have also heard that there are different flywheel balances for different year cars, so if they used a different flexplate than what was on the car to start with.....
     
  4. staged67gspwr

    staged67gspwr "The Black Widow"

    I hope so,but the only thing that bugs me is that he said that when he switched from st300 to st400 it started doing it,so he might`ve had the flexplate on right or else it shoud`ve vibrated with the st 300 also right?

    George
     
  5. Adam Whitman

    Adam Whitman Guest

    I guess the question should be did he change or remove the flex-plate for any reason? Mabe the TH400 coverter hole patterns wasn't there?
     

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