Originally Posted by RVnut
I am curious to because I cant see how the new 6 speed could be improved.. It is so much better than the 5 speed
I'm running a 5 star tune on my F350 diesel. I know it isn't what the original question was but because I have a 6 speed in that truck, I can tell you that 5 star can really work wonders with the shift points.
Although I don't have a driving RV, here is what they've done with the 6 speed from what I have experienced.
Shift points are a little more crisp yet still very smooth. There was a 6 gear bog on the Superduties where it would hold 6th gear all the way down to about 39mph where we'd be running about 900rpm. 5 star changed the shift points to now it will drop down to 5th gear at about 45mph and 4th gear at about 38mph. It is much more responsive and much more driver friendly.
Again, I understand we are talking about 2 different vehicles but for those like you who can't see how they can improve it, you'd be surprised once you actually tune what they can do to something that seems great right out of the factory.
And lastly, I got the tuner specifically for the trans tuning, not because it gave more hp/tq. I would NEVER go back to factory tuning.
To the person questioning about a "footprint"
All tuners leave a footprint that Ford can see (manufacturer, not dealer). I don't care what SCT says.. they do leave one and they've been leaving them since around 2005 +/-. Not only that, but for those tuners that tie into the ECU wire harnesses that don't download an actual file but "fool" the ECU, Ford was able to see those since around 2005 as well as I know one of the guys who was responsible for creating the software for finding "modifications".
It requires the dealer to hook up their computer to the vehicle and Ford will take control of it and download certain files that the dealerships don't have access to. This usually will only happen with a catastrophic
failure so I really wouldn't worry about that. Gas tuners don't do much for hp/tq increase unless you are turbo/super charged.