2009 CTS-V
Car was fully tuned with stock ECM and 6l90 trans, and it performed very well.
I have recently gotten rid of the factory ECM and replaced it with a MOTEC unit from John Reed Racing. I'm no longer using the MAF to tune the car, as it is now Speed Density. The MOTEC isn't directly controlling anything with the 6l90 TCM, as I still use the HP tuners to make changes to that.
Now the transmission isn't shifting as it was with the stock ECM, mostly having a flare on the 2-3 shift. I'm curious if it is just going to require some finessing with the TCM tune to get it all dialed back in. I was thinking of maybe adjusting the oncoming pressure preset for the 2-3, or maybe just doing a trans adaptive reset to see if that helps.