Is there a difference between E4OD and tcase between an f150 and f250?
Or is there a heavy duty E4OD?

 

pretty sure the transfer case is the same. i know a guy bought one off my brother f150 and it fit on a f250 with a 7.3, the 3/4 and 1 tons did have a heavier version of the E4OD same thing just better internals i think