Recently, my 1990 740 Turbo has begun to shake whenever I brake. At highway speeds, its enough to make the steering wheel shake as well. I recently took a short highway trip, and started to hear a high pitched whine or squeal while coasting. This noise corresponded to the wheel speed, not the engine speed. Almost a year and a half ago, I had this problem corrected by resurfacing the front rotors. Should this problem be cropping up again, so soon, after only 5K more miles? Should I just have them resurfaced again?
I doubt that this has anything to do with anything, but I recently got new front tires.
Advice? Diagnosis?