noise/vibration
There is a bull whirring noise that started about 4 months ago. I attributed it to tire noise. Then this past winter I put the truck into 4 wheel drive and it went ok, however everything started vibrating. First thought was u-joint however none are loose. Then I thought needle bearing, the axle has no play in it at all. So I looked at the drive shaft, it has a sloppy turn, not sure on how much play it should have. Then you turn it and it then kind of binds up, you can push through that bind then it goes until it hits that spot again. I jacked the truck up and turn the wheels there is no noise. The noise is only when it is driven. Took it to ford and they came back with nothing, they replace the rear pumpkin gasket and cover stated those gears where fine and they inspected the rest, and came back with nothing.
Anyone have any ideas or should I just start by replacing front hubs and bearings and see what happens.



