[Chrome8]

If you want to rule out your tires and wheels you need to take it to a shop that has a "road force balancer" this machine puts a wheel down on the tire and applies road force while it's balanced. The computer can pick out variations in the wheels as well as bad tires. It can also tell them where to move the tire on the rim to get them back into spec. Slight variations can cause vibrations that regular balancing can't solve. The only problem is that the machine is expensive as hell, and the shop will probably charge you diagnostic time to work on your tires. Works like a champ though. I think the carrier bearing is another thing to look at if the u joints are good.