2001 Chevy Cavalier leaking on exhaust

I wrote once before about my vehicle leaking adn I was talking about the trans pan being replaced and I still had smoke come out from under my car. Your response was if it were oil or trans fluid. Im thinking that it could be my axel seal on the passenger side because im still getting fluid on the exhaust and I do smell it and all my other fluids are topped off. Thats the only thing I can think of. ANd I also replaced the oil filter to put off the possibility of it being the oil filter. Want to know if im on the right path