A "tow" program normally has a different shift strategy, like higher shift points, higher downshift points, quicker shifting, and for the 6.0's possibly an engine brake feature.
I don't think Bill sets his tunes up with the engine brake because of the high exhaust back pressure created by it, but I have not actually seen any of his 6.0 stuff so I don't know fore sure.
Either way I am SURE you will be satisfied with it!
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