Chad Rice

HELP - my wife and i just bought a 2013 joyner trooper 1100 and we rode for 2 evenings with no problems. Went to ride last night and all of a sudden it acted like something was catching up and it didn't want to move easily. Whatever it was must've broke and now it moves with no problem but is making a rubbing/grinding noise somewhere in the backend. Could it be wheel bearing, differential, or something in cv shaft. Any info or similar experiences is appreciated.