driveline problems?

Driveline slack?having a issue when coming to a stop I feel like I have been hit from the rear and when I take back I feel a bump in the rear again,don't notice it when pulling a load?just when you come to a complete stop then take back off any ideas?all joints in driveline seem to be tight it's almost like the driveline is sliding forward and backwards seems to be worse when its hot?

 

Rear end?...ring n pinion? How many miles on? Lots of heavy towing?

 

It's got 200k on it not sure about the history of the truck,I was told there was a tsb on this issue and there was some that had complete drivelines replace to fix issue?like to know more info on it before paying out 1k for new driveline and it not fix the problem

 

Thx that seems to be the problem,if the problem is just the slip part of the shaft needing greased could you not break it down and just grease it but I guess if that's all it is then dealers would just do that vs a new shaft?unless it's more time consuming?