Vibration in drivetrain

Thanks guys for all these suggestions it helps me think but the slip yoke in the tranny is brand new and so it the yoke it the rear. But I've switched wheels and didn't change. But I've checked the pinion angle and it seems to be good. The only thing I haven't checked are the axles and I'm almost wondering on those. I'll go back through and check everything one more time to make sure everything is fine