I've noticed small oil drips all over my driveway. I thought they were from an oil change my wife had done not too long ago. Today I looked under the vehicle and noticed the transmission is leaking where the driveshaft comes out. There is a drip there and then the fluid runs along the driveshaft and drips at the rear dif (we park on an incline). Anyone have any idea what the seal or other issue might be and how much it might cost to fix? This is beyond my driveway mechanic abilities.