i wanna add diff gear oil to my pumpkins,like a top off,but dont wanna mix anything wrong,what kind of oil comes in truck stock? Syn or regular,does it have to be same brand? I wanna add a little in both pumkins? Thanks

 

Pull out your owners manual

There is a writeup on changing the diff oil down there in the write-ups area. Might as well just change it while you have them open...

https://www.jk-forum.com/forums/show...338#post533338


From the manual :

 

How do you know they are low???
If you have a bunch of miles on it, just drain and run new oil... then you can put in whatever you want...... If you wheel it, you might want to run a good synthetic, i.e... royal purple, valvolene, mobil 1, etc.....
Oh, and don't over fill,,,, especially the front, it will drain out the overflow tube all over the belly until it gets to where it should..... ( Ask me how I know that!!! )

 

ok,i knew this would happen,lol i dont want to change the oil,its brand new,i installed some rock gaurds,a little dripped out,i just want to replace what dripped out,so i wanted to know what kind of gear oil to use,to top off,do they put synthetic oil in or reg? what weight in front and back,and does the brand matter,thanks guys

 

If it is the original diff fluid it is not synthetic. The weight is 75w90 and I think any good brand will work. Hope that answers your question...

 

that does,thanks

 

If you lost fluid from the cover when the bolts were out you will need to remove the covers and replace the RTV sealer or they will keep leaking

 

x2

 

They why not include more explanatory information in your original post?

 

uhh, i asked a very specific question,and i recieved answers to questions i didnt ask,and i knew that would happen,i asked what kind of gear oil and i got,how to change the oil,is it leaking,rtv gaskets,one guy got it right,not flaming ,but you asked