Victor Badica

Hi, i bought my fusion with 45k millage, and never was replaced the transmission fluid. When i replaced start lick black colour (how i understand, this is no very good). I putted special oil for gear. Ussualy I feel as the change speed to another one uper is delay (change speed afte 3200rpm), and sometimes I feel jerks (is not everytime). How I can solve this, need check at service orafter I changedthe fluid, it will be fix to normal after one periode.