Driveline angles

Nice, thanks. So from that video, my takeaway is if the phasing is correct and the angles are parallel, there is no vibration felt. If there is a small difference in parallel the vibration would be felt all the time and get worse the faster you drive. It would be constant and never come and go, right? I also would surmise that the vibration would be in phase with the speed of the driveshaft. (vibration cycle changes with speed of shaft).

This is good info, I always wondered why some people would immediately know its a driveline problem and not just alignment or something else. This makes sense.

Thanks,
RGAZ