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#4
09-06-2015, 04:00 PM
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I've had the same experience you describe, at the same speed, on my '63 Grand Prix. In my case it was the drive shaft,
but I have had it shortened due to a swap to a TH400. It could be the wheels too, I once lost a balance weight on the right rear wheel and it had similar vibrations but in lower speeds
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 66 Bonneville 4-door Hardtop - Sold - But it has its own thread here 66 Bonneville Wagon - Sold 63 Grand Prix - Sold |
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