I have a 2wd 1997 F150 XLT 5.4L. Recently I started hearing a slight roaring noise only when the truck is moving. The noise was constant. I just replaced the tie rod ends (did this myself) and had the front end aligned (the boots on all of the ends were shot). The noise is still there. The front end doesn't seem to be shaking but I haven't had the truck to more than 60 MPH. I have noticed if I turn the steering wheel slightly to the left, as you would do changing lanes, the noise seems to go away. Doing the same thing to the right doesn't affect the noise. Any hints what causing the noise? The people that did the alignment suggests it could be a bearing.

 

Definitely a bearing. Just have to figure out which one or go ahead and do both and be ahead of the game.

 

Agreed ^^^