Who's good with noises, other than bodily?
I recently purchased my first used SUV. (1999 Explorer 4dr. with 64,000mi) When i test drove the vehicle it sounded great, now when i drive it i realized there is a deep humming noise, it also has a repetitive beat to it sometimes. I hear the noise best while driving 25-45mph and the noise gets louder sometimes while turning. Can it be a wheel bearing? I also noticed when i break 70mph the vehicle seems to shake/vibrate a bit, but not all the time. Do the tires just need to be rebalanced? HELP???