Cary
I am assuming that you are running on the stock steel wheels. This is common
as the centers over time get warped and you end up with wobbly wheels. There
are outfits that can true them. I opted to go to alloys-totally solved
problem. Swapping wheels front to rear should help diagnose the problem wheel
or
wheels. You can take them to a tire shop and have them checked for true. Also
look for a possible separation or broken belt on one of the tires. Generally
imbalance problems show up at around 65mph. Vibrations at lower speeds indicate
a
wheel or tire roundness problem.
Mike C '71 TR6
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