EDIT: The title should not say when in Performance Mode, this happens in both modes. It is just more noticeable when not in perf shift mode.
This has been an ongoing thing for quite some time now, but I never got around to truly ironing it out. It seems my transmission has its 'days'. For example, I usually run in performance shift mode, and most of the time (80%), the shifts are firm, no hesitation, no slip, nothing that would throw a red flag. However, for the other 20% of the time, it will take its time to shift. It shifts firm 100% of the time when WOT, but when not WOT, the shift in perf mode is comparable to the typical shift without performance mode. When perf shift is off, the shift has a 1-2 Error of 6.73 seconds. I'm pretty sure that 2-3 and 3-4 are similar too, but I am not sure.
I was going to do a run and post a Torque screenshot of shift times and errors, but my car decided to blow a coolant hose and puke EVERYWHERE. I'll upload it tomorrow.
I was thinking it may have something to do with vac, because when me and a friend installed a new water pump, he broke a t-connecter for a vac line and it shifted like it does now. Needless to say, we fixed that promptly. Any ideas?