I went with the the "Tow" file, I tow a 20,000lb. gooseneck trailer and didn't want to get too crazy with the tune. Also the "High Power" and the "insanity" tune.
I am just going to leave the Insanity tune in all the time. I bet this truck will 60ft. 1.6XX in 4WD.
It's so good I feel...