I have a 1994 honda accord I had a bad whirrling or humming noise at the front passenger side. I changed the wheel bearing on the weekend. But the noise is still there, not as intense as before but it is there, I think it's coming from the rear now. My question is, could it be the rear bearing too or is it because after i changed the front bearing the front wheels have to be aligned or rear brakes? Any suggestions?