Hi everyone,

I just picked up a 2008 F-350 and while driving it in 4 wheel drive I can hear a humming sound from the front of the truck.
It is a prominent noise that I have not heard from a truck before...(but this is the first time I have been in a truck this size.) I bought it used and it has less than 15,000 miles on it. I also drove a brand new F-250 at the dealer just to see if it did it as well and sure enough it did.
I was told from the maintenance guys after they double checked everything on mine that there has been a few folks bringing there Super Duty's in with similar complaints, and that they all check out fine.... it is just the way the newer Super Duty's they are...
Does anyone else have heard this or have any thoughts ?

Thanks