Not Ranked
Rotating the driveshaft does nothing. Jack up the back of the car and run it in gear and then watch the driveshaft to see if it wobbles. If it does, it was not welded straight, or is bent. Even if it looks good, bring it in to a driveshaft shop to check the balance, it might have thrown a balance weight.
Ed
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LIFE IS TOO SHORT TO WORRY ABOUT GOOD GAS MILEAGE
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Utinam logica falsa tuam philosophiam totam suffodiant!
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