I noticed a smell coming from my car tonight after I got home from a spirited drive on the highway. I checked under the car, and there was oil all over the exhaust heat shield that is right next to where the tranny meets the driveshaft. It looks like there is oil coming from there. There is also some oil on the part that goes up into the car towards the shift mechanism. What in the world could this be? What gasket/seal do I need to replace this time? 
