[sourdough]

Thanks for the update Tim.

I, like Matt, have the 6.4, 3.73 SB w/4x4. My experiences are just about like Matt's but I haven't really had an exacerbated problem with shifting on grades; but I run the gears manually when in the mountains. 3500 rpm seems to be the spot where the 6.4 kicks in and pulls like a bill goat. That has been my experience as well and once in that band the hills don't seem to make much difference.

I was very interested in the first hand account of the 4.10 pulling that kind of load. If we ever find a trailer we like better than this one I was wondering about its abilities. Our trailer is 10k gvw but we load a few hundred under that. We tow back and forth from TX to FL regularly and have had zero issues running those kinds of hills (E TX, MS, LA, AL, GA, FL) and don't hit the 3500 rpm band except maybe once or twice when traffic puts us in a position where I have to.