Problems with '97 Ford Taurus starting but shutting off when put in reverse?

Problems with '97 Ford Taurus starting but shutting off when put in reverse? - 1

Added (1). Hey guys! So basically I'm having a bit of an annoying issue with my 97 Ford Taurus.

Every few days when I start the car and put it in reverse the car just completely shuts off. I estimate that this happens at LEAST once a week if not more often than that. However, this isn't every time I start the car, but it's hit and miss.

I don't know much about cars but I know that I have a new alternator, air filter, and battery.
Mechanics just tell me it could be anything and that it's a vague problem.

Trans locked up.