I haven't yet. As soon as I do I will report that. I kinda have a problem there now though. I sold my dually with all intentions of buying another truck but can't find anything I want. (I hate the truck market anymore but that is another story.) So now I have no way of trailering it up to Wichita. I will drive the truck there if I find 3.23 gears, not with the 3.91's though. Its about a 100 miles one way.