[graewulf]

Yup. the driver side bearing was on its way out. I could feel the flat spot once I had the assy out of the jeep. Much quieter now - apparently it was getting louder over time and I didn't notice it over the whine from the rear. I pulled the axles & checked the U-joints while I was in there, I figured if they showed any slop at all I was replacing them while I was there, but they were fine.