Well I guess nobody really knows? I did the "Basic Setting of Transmission" today with OBDeleven and it took all of 5 minutes using the app. Shut engine down when finished, restarted and went for a drive. Hard to really know if anything changed, seems the same to me. My thoughts on this are if you don't do the basic setting after the battery has been out the transmission will just go through it's adaptation process after you begin to drive it a while, just like it does after a basic setting. The basic setting returns the control module to factory specs from which point it adapts as needed, and not doing the basic setting after battery removal might leave some "gremlins" in the control module, affecting it's ability to adapt as designed. This is just speculation on my part though.