Help- Driveline part failure on the way- knocking

Symptom:
Cyclic knock under load. Started out of blue. Getting worse. Reduces some when the truck gets up to speed.

History:
Towed a fairly light load 1500ish (lawn equipment) and on the way home, out of the blue, I felt a slight cyclic knock when braking/slowing down. It progressively got worse and knocked badly at take off. I babied it up to speed and while I could here the sound reflecting off cars as they pass me, I couldn't feel the knock as well.

I suspect rear u joint or rearend.

I tried the neutral/set brake/ check play. There is some play in the tranny and rear end, but I can't detect any in the joints.
I did crank it, move it slowly, and felt a grab/bind at a point as the vehicle moved.

PS. I'm familiar with u joints that use straps but haven't removed u joints that use a snap ring and there are some that don't have snap ring. Advice on removal would be appreciated.




THANK YOU

 

Never mind. Figured it out. Wasn't the truck