What is up with the brakes on my 2002 f350? I have replaced the disc's once and had them turned two times since and again they are started to surge. I pull a 30' travel trailer, probabley 4 times a year for a total of maybe 300 miles and a sleddeck with two snowmobiles for a total of 2500 miles. I dont ride the brakes and iam not on the gas and on the brakes.Is there a type of disc i can buy to eliminate this from happening?