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Thank you for the quick replies. I should mention that I actually replaced (not changed) all 4 wheels and tires with new and had them balanced. There was no change in the vibration after doing this. I will look in to the other suggestions. Thank you!



You're probably noticing the vibration more after torsion bars installed because the car is stiffer/more rigid. What kind of tires did you put on the car? I've seen many of the repro tires "out of round" and balancing can not fix that. I'd also check the transmission mount.