I went to change my rear differential oil today in my 82 300SD and found the rear diff plug stripped. The drain plug is ok. Is it possible to drain and then pump a little over a quart of fluid in and figure on losing some while putting in the drain plug? Any idea's. I am a freak for changing changing fluids and realy what to change this. I don't know if its wver been done. I know was attempted by the way the fill plug was stripped.