rear end or suspension ckunk bang (video)

See Video
https://youtu.be/qTqXb2wxJO0

Going from drive to reverse, the suspension wrap up. Even when shifting from 1-2 you can hear the bang sometimes.

Rear end?
Trans?

U joints seem tight

Seems like there is a good bit of free play in the ring and pinion adjustment. How much free play do you have in the rear end by turning the yoke back and forth with the trans in neutral?

hi kuda , also with it in neutral, lock up the e-brake, then check for excess backlash at yoke. does it have a "489" case ? wallowed/egged out cone case ? ronnie

The good news is I think you can rule out needing to chase suspension problems. Something is definitely way off in the chunk as 1969Ronnie says.

The Pass side tire is moving quite a bit.