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I stand corrected. Now excuse me while I retire to another room and try to extract my head from my A**.
Well, you caught me on a good day. The '05 Cummins that I bought has a 4.10 rear end, and I was afraid of just what you were talking about with the torque, so I have been looking into this issue.
Still think that I will loose 1/2 mpg over the 3.73.
It has to be a problem. We got a 05 cummins drw 3.73 auto at my old work and i took a 22000lbs load down FL with 800mi on the odometer. I had the cruise set at 72mph in od and it pulled as good or better than the 6.0 we got rid of.