Page 1 of this thread Wilbur1 asked why don't they offer the eight speed with the 6.4 2500.
Useing the the Ram reps comments in the link above was to answer the question posed & being bantered in this thread. At least that was my understanding. I didn't copy paste and read the link. I suppose the question there was more general as in with Duallys and using the Cummins.