I'm running a 1715 tuner in my E-350SD. I have set the shift pressure up and changed the 1-2, 2-3 shift points. I've also lifted the speed limiter. When I'm towing I go to the performance settings. It only takes about 5 minutes to make the changes on my ECU. As for the results, I have been the source of some surprize to several ricers in the past and one Z-71 just 9 days ago. By the way I wasn't towing when I met the Z. But I seem to have forgotten to reset things. My memory seems to be getting bad of late.(LOL)
Really for the ease of use and the results obtained this is one of the "Great Mods" that are availliable.