I'm butting into some heavy conversations here
I have just put new transmission fluid into my 1979 300 TD
THere was evidemce of minimal atf leaking underneath the torque converter before I did the change, but since then it has been leaking steadily by a tablespoon per day.
I was very careful not to overfill.

Do you think the torque converter seal has gone and it's time to pull the transmission?