My wife recently got a 1989 Volkswagen Golf II (European spec.) 140,000km. The transmission is shifting just a little hard into second, would changing the fluid help that? Or should I even change it at all with that many km and what I'm sure is the original fluid based on the lack of maintenance to the rest of the vehicle. I will say I am surprised it is driving so well for as old as it is and as many km it has.