Engine Vibration at highway rpm/speed

That’s the video. The phase being off is just a shot in the dark. I wouldn’t change the trans side at this time for phasing. The idea of pinion angle isn’t difficult to understand. Put angle finder on end of output shaft. Write down the angle, put angle finder on rearend yoke ears. The difference between the two is the number you want to change. Search pinion angle. This will provide the amount of down angle you want to shoot for, taking in consideration your rear suspension type. Down angle because under load the nose of the pinion rises.