VG33E - Automatic - 4x4

So,... I crawled under the truck tonight to look for possible sources of my vibtation noise. Upon inspection with my flash light, I looked forward towards the engine and saw oil on the bell housing. It apears that oil has been leaking out that vent hole on the bottom of the housing every so often when i drive, and is getting blown onto the bell housing. And were talking a light mist here people not an oil slick. So any ideas as to how much of a problem this will cause if left alone for a while? Like until Its absolutely necissary.

Not a huge deal, might be under warranty if you're still under 60K.
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