I know Ford is has a very large law suit against International/NavStar for all the problems they had with the 03-06 SD. When I worked for the Ford/Dodge dealerships here I lost count how many 03-06 Fords came in on the hook. Maybe the move to Cat is due to that, although I do know for a fact that Toyota has been in talks to with Cat to down size an engine for there new Tundra line.
I remember reading about it in a recent Petersons 4Wheel Drive. Hope Ford makes the move, of course any other motor would be better than the BOAT ANCHOR their using now
I have seen Dodges come through the dealership with well over the 300k mark, as long as one changes oil on time and keeps up with the valves every 100K.
Just my loose change on the matter.:beer: