LLY: is this the frame beaming ???? untraceable vibration

[Fingers]

Don't know if it is the case for you, but I had something similar on my truck. Did the whole tires, shocks,..... thing.

Then I replaced the rear differential. Bingo, smoothed right out. Turns out the carrier was grossly out of balance.

 

[Dozerboy]

IMO Frame beaming due to the roads. More so concrete expansion joints spacing. They are hell in CA the only place I feel I have seen true frame beaming. If you are having issues on a smooth asphalt road there is something else going on. Just my thoughts.

 

[Deuces1]

helpp

So I got an 08 LMM and iv tried the weight in the bed just before tailgate, nothing. Also drained and re-filled transfer case, nothing. The noise it makes once hitting 40mph sounds EXACTLY how the dust shields rubbing on the front rotors would sound! (But trust me, I checked them a million times and it's not the issue. Anyone have any suggestions??