I think that its going to be a replacement box that's needed. Checked the oil level tonight with engine running and oil was pouring out when i removed the plug, not sure if it's supposed to do that or if it has been overfilled

Oil that did come out was dirty too though didn't smell burnt?

Still no drive from car in any forward or reverse gears and a very faint rattle from box even when in 'Park' or 'Neutral' position?

Guess i'll just need to bite the bullet and get it mobile again though i think there will be some 'For Sale' signs being made up as soon as it moves under its own steam again

Thanks for the replies so far