Yup happened to me on Sat, gear stick suddenly went all wobbly, couldn't engage gears, called out RAC, mechanic lifted bonnet , said thats it, 30 secs to fix, ball end on gear shift rod had become de-tached, RAC showed me how to fix, couldn't get part that day, taped it on, 10 mls later same problem, I tied in in place with string, pushed in ball joint end then tied lever to suitable point on inside of engine , I always carry string, strong wire with me, tip from father, its amazing what these can do, as tempory measure, 4 days later temp repair still holding.
Read Haynes Manual, can you just replace plastic arm with ball joint, or best replace full linkage. ?
Danny, September 2010