Saw a big stain under my middle front end last Tuesday. Wasn't wet, had no smell. Just looked a little dirty. No check engine lights. Not running hot. Instead of backing in to my parking space at home, the next day pulled in after checking there were no stains. Next morning I had 4 spots like in a square! The next day a bunch more spots. Is my transmission leaking? Car has almost 104,000 miles. Never leaked a thing but condensation before from a/c. Have a closed transmission system that I was told had to be checked between 80 and 100,000 miles. I did that with the Nissan dealer before 100,000 miles. They did not tell me if any issues. My son gave me his car and he bought it thru Enterprise car sales as he works for Enterprise. He had ot for several years before he got a company car. I got it at about 80,000 miles. Any ideas? Sharing pics.