I am new to the powerstroke world and have a vibration that I cant quite identify. Vibration happens during light acceleration after the truck has shifted and is lower in the RPM range, most consistently between 40 & 45 MPH. It feels like it comes from more towards the rear but I cant be sure. It doesn't happen during heavy acceleration.
I examined my driveline u-joints and everything felt good. The Driveshaft carrier bearing was loose in the mount so I replaced it, but this did not fix the problem.
I have similiar issue, only to find out there is ice stuck on the wheel. I had to break it off. No more vibration, I am not sure about yours. We got tons of snow up here and the weather right now is brutal (-8 degrees).