Just wondering if my box has gone? I was parked up on a hill and needed to reverse went to put it in reverse and i heard a "ting" oh C**P!! Luckily I managed to get a couple of passers by to give me a push back now i can only get 4th and what i think is either 3rd or 5th and the gearstick feels really floppy, could it be the gear linkage?