Join Date: Dec 2007
Location: Alberta, Canada
i have no educated info on this really.... but i know the axles are a little wider on the newer trucks.... is the differential itself the same to where you could use the same gears? just a thought.... also if you have the 3.55s already i dont think it would be much of a difference really swapping to the 3.73.... if you have 3.31 you could tell a diff though.... but mine has the 3.31 and ive pulled 20K trailer with it and 20s on 34s and it still had plenty balls.... i would just put a mild tune on it and call it a day personally....
I agree you won't hardley notice the difference with the 3.73's.
2011 6.7 yet to be ####ed with.... Yet...