Had a Trans fail safe program notice just after exiting fwy and running the car rather hard in excelleration to avoid another vehicle, something I rarely do. Message remained on (although normal gear access and mesh seemed remained). Stopped at an errand location. When I got back in the vehicle, all notice had disappeared and drove rest of the day without incident. Car has 41,000 miles and never been pushed nor driven badly. A total mystery. Any input would be appreciated.