Violent Take-Off Shudder

I’d like to thank everyone for this thread, I’ve had a similar problem in my 340 dart but never thought to look at the trans joint angle. As one poster stated it should be the same as the pinion joint angle. I’ve been living with it thinking it was the clutch, I’m going to check the trans joint angle now!
Be sure to let us know what you find. Have fixed many "clutch" problems by simply fixing driveline angles. Just because it's all factory parts, ex: motor/trans/rear doesn't mean angles are correct either. Leaf springs sag, perches were welded on incorrectly, etc.