Driving today with no problems then noticed my gearbox was stiff when trying to get in to 4th, then couple of minutes later problem seemed to have gone away. Eventually after a few more mins had to slow, selected 2nd then suddenly when I tried to change up - NOTHING - I could not move out of 2nd nor into neutral. No warning noise like the gearbox had gone. Just before being recovered the mechanic looked at it -after a bit of fiddling with engine off was able to eventually select neutral, but still only second. When engine on, gears very stiff - able with a fight to get neutral and 2nd only. Any ideas - is it a cable problem or whole gearbox. clutch seems to let me into 2nd ok so assume its gears:*.