My fan clutch was bad from day one starting at 34 miles on the odometer... ... I picked the truck up in Kentucky and had flown in from Oregon with a tight schedule to get back in 4 days so I had no time to have the clutch replaced at the dealer I bought it from... ... . It started as an oscillating howling sound which finally went away and was replaced by what sounds like bad bearings... ... . When I opened the hood at night and the under hood light was shining the fan did appear to be out of balance... ... . Being a plastic injected part it wouldn't surprise me if the fan were out of balance... ... Truck is scheduled for repair next week... ... I'll make sure to mention the fan in addition to the clutch when I take it in.