I just installed my rebuilt outdrive [ mercruiser SE drive ] on to a chevy 350. We pumped fluild in the outdrive and when i started the engine and let it run i have a noise that comes from the back of the engine or out drive. I can hear it good at the back of the engine and even better if i sit at the out drive. DO i need to put this thing in gear for a while to get the fluild around the outdrive. Kinda sounds like a gearset low on fluild.