Vibration problem

YES!!!!

Anything is possible. Yoke could be damage, this a new yoke?

The pinion uses a "crush sleeve" to set pinion bearing preload. Pinion bearings work sortof just like front wheel bearings, that is you have two tapered bearings and the yoke nut pulls them together just like the spindle nut.

But in BETWEEN this is a crush sleeve, and if that nut is not tightened enough, the bearings are loose, sloppy, don't have proper preload

Too tight, and you will damage or destroy the bearings.

You have a shop manual?

Yoke was replaced with a used one and no i do not have a shop manual, but I think I can get a hold of one. I will also give the rotate the drive shaft a try. The rear tires are on so no seperation of the belts that I can see. I will also check the universal joints again