Bad Drive Line Vibration

I would get rid of that front slip yoke and get a yoke that holds a 1350 joint. We ran the same ujoint you are running and broke 2 of them in a 1 year period ,it took the drive shaft with it along with the sprag in the trans. I called Inland Empire Driveline service and they made me up a nice aluminum shaft with 1350's on both ends and a billet slip yoke with bolt on straps .

[ame="http://youtu.be/v2lldMmyg5I"]302 Found[/ame]