I've run into a snag on my Disco. It seems I ordered and installed an LJR 105040 by mistake, listed for XA231751 and up when I should have gotten an ERR6438 that is listed for models up to XA231751. Everything lined up fine with no troubles. Started it up and seems to be good. I happened to see that the vin code for my Disco was for the older style. Does anyone know what the difference is other than the thread pitch for the oil pressure switch?