I have two separate issues going on with my '02 535t. The most serious is a howling comming from the rear that is directly related to wheel speed. I am hoping to god it is a wheel bearing and not the differential. It starts at 40mph and gets louder as speed increases. Turning left or right does not seem to change the pitch or level so it is hard to isolate it to either rear bearing. IF it is a bearing, how easily does the rear hub come off of the axle? Do I need to make a puller like the factory model, or will a mallet do? I assume this is not that hard of a job to replace the bearing carrier. 2nd, and I have asked this before, but occasionally, and randomly, I hear a noise like a cricket comming out from behind the pass. glove box. I liken it to hearing a referee's whistle on the field when I am high up in the bleachers. It comes on for a minute or two and then goes away for a day or so. There seems to be no pattern- hot/ cold, lights on/off, speed, A/C on or off, etc. My uneducated guess is it is a relay or some electronic device going haywire. What is back there anyway? Has anyone heard this before on their car and isolated it??? THANKS IN ADVANCE FOR ANY IDEAS!