a904 Front seal leak?

Converter. When i took off the dust shield there was a pool of trans fluid i had to wipe it down. Going to take it to my trans guys see what he says. Fluid was clean and no metal in pan.

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How do you know that the front seal is leaking.
I once rebuilt my 904 and thought I had the pump in straight and bolts torqued. Only in the burnout on the track at high rpm would the oil leak out. I was stumped. Turns out I did not have the pump completely square in the bore. Removed reinstalled, retorqued, leak gone.