On my 2006 Corvette A6, I had a supercharger installed and tuned. The car runs great but there is one problem. Since the tuner isn't close I bought the HP Tuner Suite myself. Here's the issue: As I slow to a stop and the car decelerates and downshifts from 3-2 or 2-1, the shift is a little harsh. Not smooth like it used to be. So when the rpm's dip to 700 and the car downshifts, the rpm's jump to 1000 and then settle down as I continue to slow down. This is very annoying in stop and go traffic. Is there a way to tune this out?
Also, I'd like to firm up the shifts in S (Sport) mode only but leave D (Drive) stock. I'm having a hard time finding info on Normal, Pattern A and Pattern B and which one's I should tweak and which I should leave alone.