I just bought a 1991 240sx se four weeks ago and it ran great up until today. It only has 80,000 miles on it. I was sitting at a traffic light it turned green so i went.Then the car stopped moving engine still running normally. It would not move in drive or reverse. I'm just wondering if the tranny blew or could it be something else. Their was a buzzing noise before when i would give it gas but it would always go away.I thought it was the cold weather. Please help it is my daily driver.