Ok, removed the agitator and got out the trans. I took a few pictures of what I'm seeing, things look okay to me, but your the expert
I'm not seeing anything broken. I do see a little oil splatter on the case but nothing like the picture you showed, could this have just started? Also, the agitator shaft has some play in it, should it?
Knowing that if I turn the agitator or give it a push or pull, it will start spinning, makes me wonder if the play in that agitator shaft has something to do with all of this. If it's the main gear, what's that cost?