I got into accident awhile ago and ever since I have had humming noises coming from the rear. It sounds like a helicopter. I checked the wheel bearing and even had a mechanic check and it has no play. Also, I got my wheel fixed (it had a small bend) and rebalanced and that didn't help. New tires didn't help. The only thing that helped it (but didn't fix it) was when I got adjustable control arms and had lots of negative camber. Any ideas?