I own a 2002 Dodge Ram 1500 with about 120000 miles on it. Lately when I accelerate from a stop i hear a squeaking noise coming from either the rear axle or the rear brakes that stops once i get up to speed. It also happens when i brake and when i coast at about 20-25 mph. Any suggestions as to what this could be? and if you do know than is it something that I could fix on my own? thanks!