well I would not think the wheel bearing was bad my rig has 300 miles on it. but who knows

 

I had the same problem as you after i installed my 2.5 rc lift and everything was torqued to spec including my track bar and this is what i did to fix it

1. Check your ball joint by lifting the front end of the jeep of the ground and jerking on the two front tires to see if there is any play in the ball joints
2. If that is not the problem than change your toe in to 3/8 toe in or 3/8 toe out and test after each adjustment find a bumpy road and hit every bump you see to make sure the dw is gone, if you don't how to do adjust your toe in than there is right up by wayoflife look it up you want

The second one is what fixed my problem because my ball joints were still good and i haven't had dw ever since than and my tires wear fine just be sure not overdo the toe in or the jeep will drive horrible and the tires will wear uneven this is one those things that you just have to tinker with until you get it right good luck i hope you get it worked out

 

There is also a massive and very detailed write up by PLANMAN on death wobble. This is probablly the most extensive write up ever!!