Rear diff on A3 3.2

[Vulcan1212]

Hi all

I have just joined and have a question already. My A3 3.2 sport has self terminated its rear diff due to oil leak (why didn't Audi put warning light for this?) within two days it started grinding so good as dead and as you can't repair or buy the parts it's a breakers yard for one. It's ok in straight line and when I've done about 30 miles, so question is will driving it damage any other parts ie gearbox clutch etc?

PS anyone got a diff they don't want?

Thanks for any help