I've read a couple different threads on other sites about this, but none have ever came to a conclusion...

While at a stop light, about once a month (in varying weather/conditions) my car will completely shut off (the radio/clock stays on) and I have to put my car in neutral/park to restart the car. At first I thought this was a random thing, but its been happening about once a month now (I can't figure out if its something i'm doing). I've taken it to 2 different dealerships and both said they can't find any problems with it. I'm not sure what the problem is or if anyone has had any luck?

Thanks in advance.

I have a 2004 5 speed AT w/ Navi.