Hey guys, as most ba's get i have a clunking noise in my diff. took it back to the dealer and they changed the diff mount,diff bushes, the seal new oil exhaust mount and the cross member. new breaks and discs. Got it home and turning real slowly it still make the noise.. Thinking about changing the oil and adding the additive my self to see if that fixes it. any ideas what it could be as the dealer reckons they fixed the problem. I known its a SD but the noise just seems to loud for my liking, sorta like something is slipping.. Im sure this problem has been on here many times but most are the bushes mounts... what is the best oil and additive to use??