MY SISTER HAS A S80 THAT IS POURING TRANNY FLUID OUTTA THE TOP(THE THING LOOKS LIKE A VENT OF SOME KIND WITH A MUSHROOM TYPE CAP)&WONT PULL AT ALL..WHAT IS THIS PART(NON OF THE PARTS STORES AROUND HERE KNOW OR HAVE BOOKS ON VOLVO'S)&HOW DO I FIX IT,WE DONT HAVE SHOP MONEY,NOT AN OPTION!! Edi...