Engine Shut Off Without Warning problems of the 2003 Volvo V70

In early may, 2006, my car engine shut down by itself. This occurred three times. I was able to get the car into the dealership where they kept it for two days. The day after I picked it up(may 11th, the engine shut down while I was driving on the freeway. I narrowly missed hitting several cars while attempting to get to the side of the road. When the car cooled down, I was able to start it again and managed to get off the freeway. The engine shut down several times before I managed to get the car to the dealership. The factory inspected the car and held it ten days. The service man called me and stated the factory was aware of the problem and was replacing my transmission. I was able to pick up my car on may 22 and was told the problem had been corrected. Since then, the engine has shut down on three occasions, each time on the freeway. I reported this to Volvo customer service on may 26th. While driving home on the freeway yesterday afternoon, the engine shut down again and I narrowly averting a major accident. I was able to get the cat to the dealership where it is currently parked. My wife refuses to either drive the car or ride into it. We were lucky that we did not take the car to los angeles and could have been stranded in the desert or worse. I left the car with the dealer since my wife refuses to drive it for fear of a major accident.