Rear differential leaking. Need advice

I’m going from memory but it was either a green or black tube. I made sure it was compatible with oil and heat though.

 

Permatex diff stuff is green, the general use stuff is black but would probably work fine.

 

I would not mess with it yourself, you will make it worse.
like as posted here take it to a mechanic that is confident they can get it out and replace.

I have seen posts here that drain plugs in perfect condition are sometimes hard to remove.

 

This is what I would do and have done regularly having driven over many rocks. The only thing to add would be that a Dremel tool works great for those of us without a die grinder.

Also, I have had drain plugs loosen by just improperly hitting rocks.

 

Same here, I used RTV Black after I did my gears & lockers (no paper gasket). It's been banged against rocks a number of times also. Still 100% dry after two years. I probably should get (or make) a skid of some sort though (if just to better protect the drain plug, the rest of the assembly is pretty durable).

 

You whacked the pumpkin. They won't fix it.

 

I recommend Permatex right stuff 90 minutes Black. I had to do it twice because the differential "green" tube didn't cure completely even after waiting over 24hrs before filling the diff with oil.

 

Good pair of vice grips and a little heat to get those drain and fill plugs off if needed. Then can replace both with new plugs and washers…that’s what a garage mechanic might do. I’d take it to a good mechanic, they will get it fixed. I wouldn’t wait too long as you don’t want to run it dry.