I see you replaced it with a rotor 3-4x bigger than the spid you had up. The spid may be 25sq ft avg and the one you replaced it with is 80sq ft? You replaced a 1/2 ton gas pickup with a 2 ton diesel. I'm not trying to be a jerk with my reply but the comparison sounds like you really underestimated your load. 73 Mark W0NCL