This is what I would do, unless you have already.
Pull off a bracket the traps the pads. (pull off caliper first) I'm hedging that the pads are not moving freely in the bracket. IF I am right, then sevice them by cleaning the bracket, the tin clips and lubing with a quality grease.
The pictures above are not exact as yours but you get the idea.
I assume this is 4 wheel disc.
Do the same in the rear and pull the rotors as well to make sure the parking brake shoe isn't binding in the hat portion of the rotor.
ANy time I have bought pads for these trucks, the area
circled on them had to be ground more open to allow for them to move as they should.
Since you have a pulsation, don't cut the rotors discard them, making them thinner will cause the pulsation to be worse as they can not disapate the heat well. My personal preference is the ultra premium napa rotors and adaptive one pads, they should be done in pairs. I expect the pads are seized in the brackets.
You can try the cleaning and lubing first to see if it changes the vibration, but if it was mine and I have it apart, I would want to eliminate the possiblilty.
Wednesday, October 28th, 2009 AT 4:57 AM