What they mean is the rear main seal is leaking behind the engine in front of transmission where the engine and transmission meat there is a 80$ seal the labor should not be more than 8 hours and the labor on the oil pan should not be more than 6 hours with cleaning the pan but they never clean the pan I just gave you maximum hours it takes much less they just trying to rip you off I have a shop in Pomona ca if you guys need honest repairs let me know 9093334444