no i never did find the problem, the problem went away on its own a few weeks later

Hi. I saw your post on the whining noise you had on your truck and was wondering if you every found the problem. I have a 04 expedition with the same whining noise coming from the front drivers side. The noise starts around 40 MPH. At first I thought it may be the tires since they were pretty worn but I changed the tires and the noise is still there. My guess now is that it may be a worn bearing. The noise seems to be getting louder now. Were you able to fix yours? Thanks.