A few weeks back I installed new front rotors and pads on a '98XC. Ever since, I get a slight but noticeable vibration when braking at speeds over 50mph or so. There is no pulsation from the brake pedal or shaking felt through the wheel. It sort of feels like a rumble through the car.
Today, I took everything apart and checked it out. The rotors have less than .0005" runout and I made sure the mating hub surfaces were absolutely clean. I sanded the rotor surfaces to give them an omnidirectional finish. Everyhing was tight and all it looked in order. I put everything back together and went for a drive. I still get the same vibration!!
My other car, a '99 V70 got the same work done at the same time and it is as smooth as could be. I used Zimmerman rotors and PBR pads on both cars.
I'd appreciate advice from anyone who has experienced a similiar problem. Could it be that I just got a bad rotor? Thanks for your assistance.