I know this is a stupid question ,but here it goes. I decide to change my Dana 44 gear oil myself this time , cause I always had a shop do it before. Bought new gasket, 90 w oil and started this morning. How do I fill it back up?? I took of the plug bolt that is of-center on the front of the diff cover. Do I fill it through there?? How do I keep it from flowing out when the oil gets past the middle section?? Please excuse my stupid question! Blazin' in TEXAS!