I am kind of wondering that myself. I pulled the fill plug from the transmission, put a hose in there with a pump. The fluid just dumped all over me. I'm pretty sure the hose was in far enough, but there is no good way to tell if I even got fluid into the tranny. Either way, it was no use. What I'm thinking after reading some similar posts is pulling the pan and checking the filter. While the car was under warranty, I took it in to have everything serviced. But I really have no idea what all they did. The tranny could have been at another service date. I have to do an oil change this weekend, so I think I will check the filter then also.