Does anyone know if there is a part no. for the oil level filler plug on the rear diff, as I tried to get mine out the other day to check the level or possibly change the oil, the hex part inside has rounded off 2 sizes bigger now than the normal size, probably 10mm ? It looks as though I am going to have to butcher it on the edges with a hammer and chisel to get it out, so hence I need new one after I damage it !!!
