I have an 04 Expedition I just changed the front brakes then I noticed the rear brakes were squeling bad. So I changed the rears they were ready to be changed. The squeling still goes on except when I touch the brakes. I can't figure out what it could be, the brakes are only 1 month old. It is really loud and annoying It's not the wheel bearings because. I put it up on jacks Put it gear and it does not do it. Any help would be appreciated.