Lets see if I can help with some of your brake problems today. As most of you know, ten years ago most all brake shoes and pads were made of asbestos. Today most shoes and pads are made of a metallic substance. This is the reason for the brake dust that covers your tires and rims. But today, rear disc brakes are very common, as are rear anti-lock brakes.
Some vehicles even have four wheel anti-lock brakes.
Most people never even realize what the anti-lock system is designed to do, and they actually only work under certain circumstances. You have to be driving at a speed over 35 miles per hour and have a quick stop, for the anti-lock systems to be activated. One thing most people don't understand is that most squealing from front brake pads is cause by excessive vibration. What's causing the vibrations is another story. It can be a broken or loose anti-rattle clip or a rotor that is out of round.