hey there guys. looking for a bit of info here. I have a BA xr6 Turbo and am looking at replacing the rear diff oil. I know that along with the synthetic diff oil, there is an additive to put in too that they call an "anti clatter" additive. without this additive, the clutches in the rear diff will make a knocking sound at low speeds. anyone know what diff oil to use and where to get this additive?? In new zealand prefiribly? I know there are a couple of race oils that apparently do not need the additive, but most other diff oils will need the additive. thanks for any help
