1997 Taurus Transmission leak

My 1997 Transmission started leaking after a trip, I wasnt that hard on it. It got really hot for some reason. It was 1/2 Q over filled. It drained out 3-4 Q of trans. on the road. Since then I'v tried to get it really hot again to make it leak, But it wont leak anymore. I dont know what to think about this. If anyone has any suggestions, please tell me. Thanks.