I believe that third and fourth share a shift fork internal to the trans. It's possible that you broke the roll pin that secures the fork to the selector rod. Is there any resistance at all when you try to go for third or fourth? If that's the case, it should be relatively easy to repair, once you go through the hassle of getting the trans out of the car.
Also, as nickfjields says, having first and fifth be dodgy does indicate a possible clutch cable problem that may or may not be related. The pedal should have about 2cm of free play at the top. If it has more than that, it will engage too close to the floor and can give you trouble shifting.
John
Also, as nickfjields says, having first and fifth be dodgy does indicate a possible clutch cable problem that may or may not be related. The pedal should have about 2cm of free play at the top. If it has more than that, it will engage too close to the floor and can give you trouble shifting.
John
