So I normally park in the garage. Today after driving I notice a leak directly in line with my rear tires. I am not sure what or where it came from. I have a few pictures of underside of my car. I no almost nothing about being a machanic but in the one picture you can see a small discoloration in the metal. I also took a picture of my tranny fluid but it was directly after driving. Can anyone help me out. My car is an auto with full exhaust and Lund tune. Just wanted to mention that incase I have to bring to a dealer.