Am getting a noise in the rear of my "04 WJ, 2wd, pretty sure is Dana35. Doesn't really sound like a rear end whine, more like a whir from a bearing. Are there axle bearings back there somewhere? Are they a b!tch to replace? Any how-to's?

Yes, there are axle bearings. I've never replaced them, so can't help on how difficult it is. There are probably some good videos on Youtube. Look for BleepinJeep's channel.