So I have a 10 bolt, I changed the gear oil, and I cannot get the darn thing to stop leaking. Guy at local parts store told ne to use RTV on the cover - to - gasket, gasket to housing, NO RTV between gasket - to - housing. Any All-Knowing GMT Gods please help. I use a felpro gasket and blue RTV, is that the correct RTV? What do you use?