I did a bit of Googling and looked around before posting this; just wanted to get a second opinion.
Heard a whining noise when the agitate cycle started on this.. not sure what was going on, so Googled and saw three things:
3) the bell shaped thing that coupled the transmission with the agitator assembly
So, filled it up on a small load and let it start agitating. Hurried up and pulled the lid (my magnets must not be strong enough to fool the reed switch), and saw the agitator assembly spinning a little. Pulled the agitator off and did the same - saw that the bell shaped plastic assembly was moving back and forth.
The bell shaped plastic assembly freely moves left and right - I'm gathering it's supposed to be firm and not really spin too freely.
So, does everyone else think it's probably just the bell assembly as well being stripped off of the metal transmission post? Here's what I found (I've seen numerous part numbers for this, so not sure if it matters which ones I get...):