Originally Posted by accumack
As long as you can stay below the weight limit on the 340 with the Allison 2500 it's fine. If you have concerns get the 360 with the Allison 3000. I'm happy with the 340 and love my fuel milage. I don't know if the fuel milage is affected by the 360 or not. Cost was also a factor.
X2 "As long as you can stay below the weight limit
". I have a 340hp and weigh in loaded (with two people) at 11,100 front, and 18,200 rear. I have had a tire and axle air bag upgrade. I no longer have to run the tires at 110 psi; the tire maximum (running 84 psi on the rears).
Lot of posters to this thread talk about power and mileage. Yes, I made a couple trips around the U.S. and the mountains. Yes, the 340hp can hack it. The big plus of the 360hp is the Allison 3000MH tranny (a beast) and the increased axle weight ratings.
You will note that in the 38A specifications, the CCC and UVW are mentioned in the fine print, but not with any specs.
Weight consideration and safety of your tires is very important. Do not make your decision on the dealers words. Do your homework and get the moho weighed before purchase.