Update on transmission leak

pickjare wrote:
Weather you drive a Ford, GM, or Chrysler, the engineers at each respective company, and the technicians working at the dealer, have far better understanding of what/how a seal needs to be made. Maybe your old Ford seal (with how many reliable miles?) just wore out. But more than likely, your transmission is creating too much heat while towing. If a leak returns, see the best Ford dealership you can find as they will be the most trained/experienced on what needs done.

Maybe in the manner of transmission seals but Ford material science nearly got me.

FWIW, I have just shy of 200K on a 4R100 mated to a 5.4. AFAIK, it's never leaked. It has "been rode hard and put up wet" a few times but I live in cold country. The tranny cooler is larger than the one pictured for the diesel.