OK, i had the driveshaft balanced, and its now dead on. But it didn't solve my vibration problem! At 80+ there is a strange vibration. I put aluminum drums on, is it possible that they are out of balance? If thats the case, can they be balanced? I am pretty sure that the wheels are fine. I needed new tires anyway so i am putting some on today. Does anyone have any ideas as to what is causing this?

 

I remember reading somewhere that steel driveshafts tend to vibrate above 80 mph. An aluminum driveshaft might cure your problem. Can anyone else back me up on this info? Or have I been misinformed? Thanks.