Rear wheel bearing, a few tips in addition to the DIY.
 

Job took me 4 hours with one trip to auto zoo for the slide hammer and clean up.

1. Get a slide hammer and the axle hub add on, its a free rental from autozoo. Using the rotor is a waste of time and lug nuts.

2. Instead of the black bar I put the tire back on the hub let the car down to keep the tire from turning and then used a 1/2" fu joint bar to break the nut

3. When cranking the nut back on I used the 27mm wrench that I had (any big one will to) and the jack. I put the box end of the wrench over the lug nut and across the hub. The last turn to the .001 or whatever tolerance was a PITA.

4. Bigger is better. I got nowhere with the 2lb, I got the inner race out using the sledge hammer. On the outer race I found that the 5lb weight from the slide hammer did the job with relative ease for the cramped space that is back there.

5. Use string or coathanger etc to attach the axle to the sway bar. This gives you the ability to slide it back and forth as needed.

Unfortunately I made a bad diagnosis on the problem. My wifes car has had a ticking that you can feel through the body, it felt EXACTLY like a bearing. Looks like it was the axle (and thats a job I can do in a few hours with relative ease).

Thanks to BC for the tool rental.