I changed my trans oil with atf type f before I rode the other day I put 21 ounces in it and I just now drained it and it only had 18 ounces in it? There are no leaks on the case and don't think I have a bad deal cause I just had the bottom end rebuilt last year. There is no white smoke either. When I checked it cold it was at the top line on the window. Am I ok or do I need to look into this?