Re: misfiring on startup trans overtemp
After it stalled, did it start up normally? Is (or was) the check engine light on?
Having a fault code will help a lot in the trouble shooting. Was the engine hot when you tried to start it? Many times a bad crank sensor gives problems as you have. The transmission overtemp message happened to many others, even with cool transmission. When i´m not wrong it was mostly the transmission controller which was causing that message without reason. Depending on the engine, this controller is a stand alone, or integrated into the PCM.