“LEAKING” Automatic Transmission Dipstick Tube

your tube brace maybe bent slightly and pulling the tube out a little or cocking it in the case and allowing fluid to drip or seep.
Yep. I had the same issue with 727 in our 1st 67 fish many years ago. The trans came from under a van so I went to a parts yard for car type tube and stick. Anyway... Let the tube stand straight/centered through the o ring, hold it there and work out the brace. I might have ended up with stud, nut, then brace , another nut.