I am not sure why this happens or what is wrong, but all i know is that the last time this happened my car broke. Anyways today i was driving and nothing happened out of the ordinary but i looked out my back window and i realized it looks very dirty and foggy. It was rainy out so i assumed it was just the water, so when i stopped i wiped my finger on the window and it wiped off. The back of my car had an unpolished look to it, and my tire cover was rainbow looking. This has happened before except i felt it happen last time. I assume that something blows out of the exhaust pipe because that is the only thing visible that could possibly do that. I got napkins and wiped off the oil/mystery fluid from my rear window and it streaked rainbow so that is why i know it is a fluid from the car.

My transmission has been also being off for about a few months now and i don't know if the two problems are related. Last year i had to basically have my whole transmission rebuilt. I am not really sure what is happening.