A couple months back i replaced my chain on my 2003 Specialized rockhopper. Yesterday i went for a ride along an new oil pipeline and when i got back i cleaned and lubed everything on the bike. When i was riding it around the yard today i experienced chain suck, only i wasn't pedaling (maybe just a quarter turn backwards) which i only think could be the cassette bearings since there seems to be grit and noise coming from there. I also noticed it was getting caught up as a tried to lube it. So, is my cassette done for?
For reference it is a Shimano HG-50 i think.