That's a fair point, one I have considered. I know a guy who has a 5.9 magnum in a Durango. He is trying ot figure out why his transmission won't go into O/D, but if he has to replace it he is going to swap his built 5.9 in it. I may just buy that 5.9 and NV3500, because he has tried everything to get the thing to shift into O/D