My dipstick, yes, I have one in my 04-F150, says Mercon V, but the book which came with the truck does NOT list it.
I checked the Ford site, but it only says it is a maintenance free tranny.
Mercon V it is.
I find it odd, that the book they give you says to change the fluid at 30,000 miles and the Ford site and literature says it is maintenance free!!!