Thanks for the info. There are so many tuners. The SC 3865 seems to be the newest model for the for the 3rd gen. 4.7. I don't think the tuners can adjust the shifts on an '02, is that correct?
Nope, no trans adjustment for us. 3865's seem to be more plentiful, SC actually has a newer model out to replace the 3865 (I forget the #). You can datalog with the 3865 though, so you can get an idea if it's getting any quicker than before.