I had a 3-speed standard tranny before the swap. The T-5 is a World Class. I have pulled an 8 ft trailer with light loads many times and have no trouble. I don't push the truck to hard it's old like me and likes to cruise. I'll be changing that rear end gear sometime next year the 3.39 would be a good one I think. As for the 5.14 dually I can't really say ,but someone else here is sure to have some good advise.
