Last winter I drained mine. Only a small amount of thick black liquid was in the pan while draining all night. I then ran kerosene through a few times to hopefully clean out any remaining black liquid. I then filled with Redline to the fill hole and plugged it. Then I added quit a bit more through the vent hole using a special squirt bottle. In my opinion that little bit of oil to the fill hole is not near enough! Put some oil in it! It now runs very quiet and I haven’t noticed even one drop leaking through the vent. Think about it....all the differentials like a Ford 9 is filled at least half way full.
High Noon
