I only have 30K on my 07 expeditiion and had the same problem. The brakes were squeling anytime I went to slow down or stop. I went to get my vehicle inspected and they guy told me that I needed new brakes before they would inspect.....talked to owner of shop, they went ahead with the inspection without brakes....told him i would let him do the brake job, but they were too high. Had to shops tell me I needed new rotors and pads, rotors were worn too much to turn. Both shops wanted way too much for the parts....bought slotted rotors from RotorPros and got Posi-Quiet Extra Duty pads all for $320 shipped to my door. Quality is better than oem and my truck has less dust, stops quicker, and is quiet, dont even hear the brakes anymore thankfully. Had a shop put everything on for $150, total cost to me $470 parts and labor. Awesome deal for 4 rotors and pads all the way around. Plus changed brake fluid out to full synthetic. Can't be happier. The rotors are zinc dipped and no longer show rust at all. I have driven about 800 miles with the new setup. Rotorpros uses Centric Rotors and Centric now owns Powerslot, Posi-Quiet and a few other companies. One thing to note, the front pads were only worn 50% but were glazed over which was causing the squelling, the rears were almost worn down to the censors.