SEEN THAT BEFORE ,LIMITED SLIP NEEDS POSI LUBE ITS A 4 OZ BOTTLE OF ADDATIVE THAT LETS THE REAR END CLUTCHES SLIP A LITTLE, MOST POSI REAR ENDS NEED IT . MOST OR ALL DEALERS PARTS DEPTS HAVE IT YEARS AGO YHEY SAID IT WAS WHALE OIL ,LOL WHO KNOWS.TRY THAT AFTER ADDING GOO OUT AND DO SOME FIGURE...