I have a problem with my freelander. I have F4 flashing on my dash, which I think is a gearbox problem. Mine is an automatic which will not pull away in 1st gear, so I use manual 1st to pull away then switch to automatic. I have also developed another problem. Lots of smoke coming out of the rear when I start it up and more when I accelerate. The engine runs fine except for this smoke, I cannot see out of the rear window that's how bad it is. Can anyone help me find out what the problem is please.