Carrier Bearing Noise: Bad bearing or just vibs from lift

I had no issues with my 3" lift. When I installed my Dakars it got an extra ~.5" lift and sitting at around 3.5" in the rear. I imediately noticed a sound at highway speeds; kind of a low bass "Waaahh, waahhh, waaaaaaaah" sound and only when on the gas.

Is this a bad bearing or just a vibration?

After looking over countless other Carrier Bearing threads (yup, I used the Search function), I think what I have is different. Its sounds like a vibaration more than anything else and I have zero play in my carrier bearing (with my whole weight on the axel).

Im ordering some 3* to help angle of the shaft and am considering a bearing drop but wanted some advice before spending money.

 

Found this and I think I figured it out. Shims needed def, maybe need to adjust the CB height as well...

http://www.tacomaworld.com/forum/2nd-gen-tacomas/153050-just-fixed-driveline-vibration-free.html