Last night changing from 2nd to third i lost all gears and the car wont drive atall,it has an Alcon clutch.

What usually happens to them,will it need a new plate?

Cheers for any comments.

Update..

Got the box out and the clutch was worn,the front diff was also finished so a new one went in,the viscous coupling was also a gonner which i was told made it lose drive along with the diff.

So all new parts assembled ect and the box went back in with the relined 6 paddle.
Guess what? It still has no drive,the box is now back out and apparently a pin may have snapped for the selector .Hopefully it'll be on the road tommorow.

To be fair i have done 20 standing start with it and recorded 9sec to 100.
i'll never launch it again it just seems pointless after all that work.