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yeah, grab the base gently but tight with pliers and wiggle/pull it out.

snap off the loose cap on it and wash/scrub it clean. it can get clogged. it's white underneath all the grime. just shove it back in the hole when yer done resnapping the cap back on it.

it just pulls out and the cap just pops off...

some 4x4 guys add a hose to diff (add a nipple) then slide the vent into the other end... raise it up above any water they'll be flyin' through...
 

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pull out the side plug and see... the oil should be to the threads on the bottom of the hole... ;)

on level ground...
 

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All are correct, also sometimes the plastic is not a tight fit in the housing so a little rtv will keep oil from coming out around the base of the vent in that case.

Miles
 

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people sometimes wonder why the diff covers are made/shaped as they are... as the carrier & gears spin the oil is deflected onto the cover... the shape of the cover flings oil into the tubes for bearing lubrication & cooling...

sometimes, depending on style of aftermarket cover, the oil is deflected differently... if slightly overfull i can see where oil could be flung up into the vent...

i'd check fluid level anyways just to be safe. if it is very slightly overfull once plug is removed it'll just drain out. wipe it up and reseal/install the plug... you should then have no vent leak/seep issues period.

on those girdled covers, make sure the girdle studs are properly torqued and use loctite on jamb nuts...
 
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