Problems, problems, problems

I finally kick the virus I had and got a chance to work on the car again. What do I find? You guessed it, a problem.
I have a leak out of the front of the tranny I rebuilt. I think it is either the front seal or the pump housing seal. So out comes the tranny. I am not impressed.
Has anybody got any ideas on anything else I should look for?

This is a 360/727 combo that had no vibrations when I started it. It has only been started in park to this point.

Jack