Hopefully it's just a couple of seals.

 

A seal and a yoke and an FSM!

 

Could you be a little clearer as to where it's leaking?

You may just need some brake cleaner and permatex...

 

If it is leaking around the mating surface, one option is to snug up the nuts on the studs. Take care you don't snap them off, I think they only take around 19 ft.lb. torque on those. If that does not do it, you'll need to pull the 3rd member out then clean the mating surface and apply some sealant and reinstall the 3rd.

 

yeah you should clarify where its leaking...could even be the drain plug or something

 

If its leaking from where the 3rd bolts to the axle housing you need a new gasket, so you will have to pull the third and axle shafts to get at it.
I have to do mine

 

I've never bothered to get a gasket for that flange. All you need is permatex or sealer...

 

I already got the gasket. was only a few bucks..

 

Might be just the vent on the top stuck from dirt or rust.

NEED MORE INFO

 

Umm, it's not your diff that's leaking in the pic above...

 

give us a pic from the front of the 3rd where the d-shaft attaches to the pinion flange. Mine is leaving drips like that do to a bad pinion seal, but hard to tell from the back picture.

 

i believe that is called the companion seal and i have heard they are fairly easy to change.

 

Yeah I've heard it called both, and it is easy since I had to do it once allready about 4 years ago.

 

You guys are great! Here's a 2nd shot.

 

Oh, fill plug gasket. That's super easy to fix. Was that a gag saving that pic till last? Just to see if people might guess that?

 

Hm. I don't see any pics. LOL