My pads were getting thin so I replaced them with Wagner ceramic ThermoQuiet. A little hassle getting the pads to seat but not the hardest swap I've done. Although this is the first time for a Toyota. Drove around the block, testing the brakes, no prob. Got onto the highway and at 60mph the steering wheel starts to vibrate and gets worse the faster I go. Braking is even with no shudder, nothing in the pedal. Pulled over several times off the highway and the disks were hot and had darkened some. I've put the car into neutral while coasting at slow speeds to see if the pads were sticking and it coasts just fine with no pull to either side. No pull when braking either. Any ideas???