Hey all. Hopefully you can help me. I have recently started hearing a noise from the font end of my car. It's kind if hard to explain the noise. I'm do my best. It's kind of like a hum that winds up as I go faster, and down when I slow down. It almost sounds like when you put a card in a bike wheel, in the sense that it's kind of a slow and deep noise at first, but as I accelerate, it gets faster and higher pitched. It's definitely not an engine noise. It's also not a bad hub, as I changed them out recently.
Things I have checked:
I checked the hubs by jacking it up and looking for play. Good there. I also put the car on stands, turned her on and gave it gas to turn the wheels, in neutral. I don't hear the noise from the wheels, it seems to be coming from somewhere between the wheels, under the car.
Any help? What can I check? How can I check it. Etc. I don't like taking it to the shop if I can do it. Thanks.