Whenever I go 61+mph my truck starts to lightly vibrate and it make a loud air noise. Even when I let go of the gas it does it, but as soon as it goes 60mph or less it stops. What can it be? We've replaced the uv joints, spark plugs, got tires inspected - their good, no break problems... what can it be? Suggestions would be greatly appreciated.
I know everyone is mentioning rebalancing tires, I took my truck to Sears and they did this... and still have the problem... and Sears also mentioned that the thread of the tires looked good.