Sounds like the plates are worn mate and they can be rebuilt if you get new plates for them. As far as I know quaife are the only ones that don't do the torque plates.
Cheers for that! How much would you pay for a f**ked one that you could rebuild? I found kit for 250 off rhd. It comes out lads box tomo so will find out
Probably about 200 mate, by the time the plates have been brought, and the labour cost in stripping it down, rebuilding it with new plates, setting the torque lock etc, it will probably come to near enough a new diff's worth lol.