My RV decided to mark it's territory after coming out of storage, needless to say I'm not impressed. Diff cover is wet at the bottom, it was NOT leaking last year, and the storage company didn't complain about it marking up their space. My current guess is the vent assembly is plugged, caused it to build pressure on the drive home and then found the weakest place to escape? It's an 06 Ford E450 chassis, if I'm reading the tag correctly a Dana 70 rear axle. I did note the bottom cover bolt was not fully torqued compared to the rest, but I doubt that'll solve the issue on it's own. I see Ford lists cover gaskets, I'm seeing signs sealant was used and many say to skip the gasket? What's the beeb-think on the topic?