Thanks for posting this, it's a fairly common failure on Ford vehicles in the fleet, more so on Fiesta, Focus, and Fusion. Upper bearing turn plate breaks. I've never seen one on a Taurus, can you tell me if it contains plastic in the bearing plate? That seems to be the failure point in the other models. Typically a clunk thud heard when you turn the wheel back and forth usually in the same point of rotation (As you, or an assistant turn the wheel you can typically find a sweet spot where the noise occurs).