Well I was driving down the road this evening when I felt a odd vibration, I didn't think nothing about it at first because I was almost to my destination. Well when I put the truck in park and was letting the turbo cool down I felt the vibration again, and also noticed a strange noise. So I popped the hood and looked and tried to hear the sound. Then I noticed that the fan looked like it was doing funny things and herd the noise and it was coming from the front of the engine compartment. So I shut the truck off and looked at the fan blades and they marks on them that looked like they had been rubbing against the fan shroud, the only thing I can thing of is that the bearing is going out on the water pump. Any other ideas????????????