Hi All. I,ve just bought a low milage 2004 td5 auto and having never owned an automatic before I was wondering at what speed the gears are surposed to change up at . It seems to me to be abit slow at changing up and seems to select 4th at just over 50mph. You also have to almost lift your foot off the power to get it to change up is this correct???. It has only done 50000 and I was told it has had a trans filter and fluid about 2000miles ago but I haven,t any evidence.