I have an 05 freestar that squeals going straight its not belts pilleys or brakes

This is the answer for that squealing sound:
"That squealing sound for your freestar is coming from the brakes it self, but theres nothing wrong with the brakes. You know where the brake pads sits, there are four clips on each pads that holds them, usually a silver metal clip, sometimes that thing will get loosen or pushed inside touching the rotor when running after a long hour drive. You just need that clips tighten up or change it with a new ones. I fixed mine too and squealing is gone"

What about the wheel bearings they wont squeal going around a corner because the weight on them but they will while driving straight.