engine vibration/drone at 2k rpms

2011 57k. I seem to have a strong vibration that is very drony when under load around 2k rpm. seems to reverberate through the whole truck. Its not exhaust.. Seems to be load sensitive as well. If you let off or are going downhill its not really present. Seems to originate straight from the motor.. Just wondering if this is kinda normal with the 4.0 or if others experience it. Its not a shake, or any kinda of clanking or anything.. Just a drony Vibration. Thanks

 

also noticing if at idle,, I rev the motor.. its real smooth til about 2700 rpms,, and then the vibration starts... And is present on up and back down then stops around 2700 on the way down.. Almost as if a cylinder drops.. but not quite that rough. And I feel it in the steering too.. kinda like riding a lawn mower vib. kinda annoyin

 

vibes are comparable to blowing out your mouth and humming at the same time.. The way it vibrates your face.. that's what I feel in the wheel, in the floor, on the pedals.. everything. You can even hear the vibration. and it seems to be somewhat load sensitive. The more you load the engine, the worse it is. ( give it gas going up a hill but not enough to downshift) Anybody?

 

FWIW my '09 with 137k is very quiet/smooth from idle to redline...

 

I am experiencing the same issue only does it when engine is loading and gets worse the more it loads. I was wondering if it isn't that bearing in the front diff. I don't really wanna drive my truck at 50+ mph on dry pavement to test though.