To update an earlier post: I had a new Dunlop installed and presto!!! the vibration is gone. However, the guy that put the new tire told me he found Fix-a-Flat in the tire. I bought the car used, so i guess, thats what I get. Anyway, I really don't know for sure now if it was the Fix-a-Flat that was causing the vibrations in the first place or if it caused the steel belts on the tire to separate or if it was caused by something else. I'm just glad its fixed.