Just saying if it was completely full would it do any damage. I not saying I've done it, I know the haldex capasity is just under half a litre, then you have leakage replacing the plug ect. It's something I'm looking into with the haldex modification, I found out the haldex clutch can get hot when you have 50/50 split and you only have less than half a litre of oil to keep it cool.