I was driving home tonight and the outside temp is -6 deg F. First thing I noticed was irregular shifting like it was stuck in a lower gear. I tried to make it home, but it finally quit completely and the cabin smelled horribly of transmission fluid. I think one of the lines must have burst and ran it out of fluid. It was towed to the dealer to be looked at. It is 6 speed with the added transmission cooler. If it did run until out of fluid do you think it ruined the transmission?