I take my 2002 LR freelander to a local AAMCO shop to get the transmission fluid changed. They change the fluid and then on the drive home the transmission did not want to shift. IT would stay at high RPM's and then shift. THen it works itself out and shifts smoothly. I go to the sport mode manual shifting and it shifts really hard. I get the F4 blinking on my dash. I restart the car then it works great but reverse feels like its slipping big time. THen today I have no reverse. The transmission shop say they used merc 5 fluid and put in 4 liters which was how much they took out. Whats wrong with this car?