Recently installed FBO ported Lt2 im, zr1 tb, rotofab, and longtubes on my 2016 Camaro SS
Car was being tuned and something happened that the tuner has never seen. While in manual mode during a WOT pull the transmission tried to downshift to a lower gear so in fear of hurting the car the tuning had to come to a hold.
Shortly after the install was done I myself noticed the same thing while moving the car in manual mode, upshifted to third gear then all of a sudden I see its trying to downshift to 1st. Never occurred prior to bolt ons.
Any help would be greatly appreciated, my assumptions is the tcm is taking a crap.