That is an excellent point. Look at your pads and compare the left and right sides for the front and then then the same for the rear. The pads should look almost identical. I had a sticky rear caliper that was causing squeal and lots of heat.I like all the high tech brake bedding chatter. It's all true and good info. but I'd bet the farm that you have a sticky caliper. Before you jump off the cliff and buy an expensive set of racing brakes for your tractor just to destroy them in short order with a bad caliper, do inspect the old pads for wear with an eye for uneven wear. These trucks are 20+years old. Calipers do freeze up and your symptoms are EXACTLY the same as mine were. My problems were totally fixed with a caliper rebuild and a regular set of pads.