Finding a 6.2 around here that doesn't have the 3:73 rear end is a pretty tough find. We did go back and test drive another truck with the same powertrain this evening. As we left the dealership it again felt like a puppy trying to pull a dog sled on concrete...no power period. Felt like it was trying to take off from a stop in 5th gear.

However after spending a little time driving at various speeds it started to learn how to shift and came to life. No it still doesn't feel like my V10, but it was a vast improvement over the first test drive. So we are chalking it up to needing to adjust the computer to real world driving.