Welp - brought it to a reliable mechanic this morning and it's not the bearings or u joints. He said it's tire noise (tires are less than 1 year old). Thanks to everyone who replied!
Hi! Thank you for replying - and yeah, I know...very hard to tell without hearing. :)
I can only hear it when going under 20mph. I don't know why but maybe because of engine noise or faster rotation of the tires drowns it out at higher speeds?
Also, I do hear it every day, but not every single...
Seriously... I know it sounds silly, but for the past few weeks my Jeep Liberty (2004 Sport) has been making a strange "woo-woo" sound. It's like a friction sound that I think is coming from under the car.
It doesn't happen ALL the time but when it does it will go on and on and then just stop...