I recently changed my Transmission fluid. I went to pep boys and got some of the High Mileage fluid by Valvoline. Shifting doesn't seem to be as smooth as it was before. Did I make a big mistake with the cheaper fluid. Should I get some better fluid and try again. Also, just to be sure, I pumped fluid into the filler hole until the fluid started running out of the hole. Does it sound like I put enough in?
Thanks
Thanks