Originally Posted by Thirteendog
I don't believe this is true, rather than holding the gear at the top of the RPM range it doesn't downshift unless you tell it to. So a recap and I'm sure Steve will chime in. You still don't have to upshift because it'll do it for you (at a slightly increased RPM level [6200 rpm I believe]) but you do have to downshift because it'll hold whatever gear you end up in.
I feel like we are saying the same thing...
...what I was trying to say was that when you get on a dyno after the TCU tune, you won't have to worry about the car shifting gears from the one you want to be in...i.e. a 3rd gear pull it would shift into 2nd if you dip in the throttle too much.
...then again, if you get a dyno operator who knows what they are doing it won't happen anyways.