Driveline vibration!!! I need help!

805moparkid said
make sure the installed the yoke 90* off center from the other... the cross in the yoke for the trans should be 90* from the cross on the pinion yoke

This is not true. the shaft yokes can either be lined up (like rifle sights) or 90* off. What they must NOT be is "somewhere in between"

An example:

and another: