Yellow Fluid From Car. You need to clay bar it, then wash with dawn or similar, then wax the car. It can smell like burnt marshmallows.
Again, if you know where your transmission is located, then it would be a lot easier to identify the source of the leak. The key to distinguishing the difference between the two is the slickness in texture of brake fluid over oil. If your vehicle is leaking yellow fluid, radiator coolant is generally the culprit.