Campfire Time wrote:
It is not warped rotors. True rotor warp is very rare. If it was warped rotors you'd get the pulsation all the time at all speeds.
It's hardened pad material stuck to the rotors. And yes it's caused from heat. Moreover it's caused from improper bedding of the pads, or lack of, after installation. Especially with ceramic pads. After it happens pull over and look at the rotors. You'll see little comet like deposits. It's more prevalent with ceramic pads but can happen with any type of pad. Thickness of pads is not an indicator that this will or will not happen.
I'd put new pads on before doing anything else. And readjusting the BC would not hurt either.
x3. I would get the rotors turned to remove the deposits, some new pads, and bed them in correctly. Also don't depend so much on the trucks brakes when descending. Let the transmission and the trailer do the majority of the job for you. Also, watch your speed at the top of the hill so that you can more easily control your speed on the way down.
