trying to find source of vibration

1.........Do you understand rotational clocking of the slip yoke? I cannot tell from that photo, but either of the caps on the one--piece part of the shaft MUST be "inline" just like rifle sights, if not, welded wrong

yeah think I know what your talking about I call it u joint phasing when you look at the shaft the joints are inline

I think my next step is to put the car on jack stands and see if or hear and issues with the car on them when running thanks again for the input guys