Thanks for the info.
I have now taken the whole gearbox apart and I couldn't see any broken or cracked parts
It was running very tight with a noticable "notchiness" at a particular point when turning the gears. I removed the whole lot, regreased and then rebuilt it.
Now everything seems to be ok, if still a little tight (but not as bad as before), but nothing worse than when new so hopefully this will loosen up with some running.
Hopefully it will all prove ok this Sunday as Seaham
