My 2000 lx estate has done this 3 times now. I have to remove the exhaust (two bolts, between the exhaust and the cat, and 5 rubber supports that hang from the car). Remove the heat sheild that is between the car and the exhaust (6 nuts). This will give acces to a black box with a lid with about 12 screws holding it on. Remove the lid and you will see a ball joint flapping in the breeze. Click the ball and socket back together and your gearbox will work again. Must be a repair to stop this happenig again, but it only happens every 2 years or so.
richard, May 2008