904 2nd gear stucking? Pls, help!

Yes, it was in neutral when filling and in first startup.
But it actually spilled out some oil from the first in front oil pipe... Car was running maybe 2 minutes before i noticed it. :oops:

So, can we assume that I need to drop the tranny again, and renew clutch plates? Or what was that friction plate what you are talking about?
I really am newbie with automatics.