For the 2012 Super Track Pak... you have to push and hold the traction control button for a full 5 seconds for mode 3. I have to be fully stopped for it to happen. Mode 2 is just tapping the button, it shows off but its not fully off. And because the first time I was confused, this is not the "Sport" button on the display, its the far right button under the display.
2012 Dodge Charger R/T Road & Track, Super Track Pak, DiabloSport 91 Tune, Mopar CAI, Borla S-Type Exhaust, BT Catch Can, Serious Metals Strut Bar