Is this vibration the drive line?

I wouldn't pull anything off until you thoroughly check each component in the driveline first. Play in the u-joints- wiped out carrier bearing- input and output play on drive axles- pinion angle/ ride height.
Throwing money at a problem first always is the wrong move.

 

It could be as simple as a need to balance your tires

 

I recently had this and it was the slop in the front yoke.
New one on it now and good to go.

 

I don't know what you are chasing but the worst one to chase/find/figure out for me over the years was sloppy injector spray. The bottle of Lucas does exactly what it says it does on the side of the bottle.

After back to back ot back to back tests over 150k or so I now swear by it forever. I won't fuel without it.

 

In and out vibration can also be loose wheel bearings. Supposed to be adjusted properly at 0.001-0.005” play. Most are found to be over 0.020”

 

I'd check your ride height

 

Drive it until it breaks. Trucks vibrate. It is what it is.

 

Genius lol

I guess my truck is broken then because its smooth as silk.