Freelander gearbox problems urgent help needed

I have a 2001 Freelander v6 with auto problems, it will only go into 1st or 2nd then lips and goes into a 4th gear with F-4 flashing on the dash. I am looking to take out the gearbox, but can I take out the gearbox without removing the engine? Any help would be great

There is a lot of testing you need to do before you think of removing the gearbox, all covered here on this forum, firstly check the oil level followed by testing solenoids and plug/socket connections etc, even line pressure testing. A lot of work can be carried out with the gearbox insitu, e.g replacing solenoids and the most common fault (so it seems) replacing the the reverse piston. HTH