I have a problem with the passenger side rear disc brakes. Certain times when I tow my boat, or just drive unloaded, my brakes smoke. Only the pass. side. Truck is an 04 4x4 4dr dually, 42k miles, did pads all the way around about 4 months ago. I don't know what to make of it. (The boat weighs 5,500lbs 
