Was the Excursion platform ever offered with a 3.40:1 rear end? I?m fairly certain it was only offered with a 3.73:1 but when I read my stock file, it shows the final drive ratio at 3.40:1. Anyone know why this might be?
This is on a 2005 6.0 4x4.
I would change it and see what happens but it is so picky about writing tune files it?s not easy to just swap back and forth.