Because I like to sound stupid.....

jsc7002 · **Posted:** Wed Jun 11, 2008 2:06 pm

Im about to change the fluid in my rear diff. but I cant seem to find where I put the oil back in.

is it this? and if it is what is the rubber cover thing??

bugnout · **Posted:** Wed Jun 11, 2008 2:11 pm

Yes, thats the filler hole. Need to pull that rubber plug out to fill the diff. Add enough until it overflows and replace the plug.

If you need to drain, then you have to take the cover off. I recommend a lubelocker gasket rather than RTV. just makes getting it back together so much easier.

Blue KJ in PA · **Posted:** Wed Jun 11, 2008 2:12 pm

bugnout beat me...the rubber keeps the good in and the bad out...very technical terminology and a highly machine barrier... :lol:

jsc7002 · **Posted:** Wed Jun 11, 2008 2:14 pm

so is the rubber thing the plug??

Blue KJ in PA · **Posted:** Wed Jun 11, 2008 2:38 pm

yep...a little brush up how-to... http://www.jeepkj.com/forum/showthread.php?t=28670

WGNMANinaRENEGADE · **Posted:** Wed Jun 11, 2008 3:47 pm

YOU can partially drain the diff using one of those little pumps that fit on oil jugs. might need to put an extension on it to reach the bottom [i can't remember right now]. just siphon out all you can.
i used a very small bit of white gas to thin it out when i got near the bottom- let it set a little, then continue siphoning.
you won't get 100%, but you'll get most of it, then put in your new stuff. i stuck with the heavier recommended stuff since i was sure i had a thimble-full or 2 of white gas left rolling around the bottom.
oh yeah, and from an old thread here- if you even think you have the trak-lok or other type of locking diff, USE THE FRICTION MODIFIER! you don't want to hear what it will sound like if you don't...

dgeist · **Posted:** Wed Jun 11, 2008 5:05 pm

I'm due for another gear oil change and I was wanting to try something other than my wire wheel for getting the old RTV off. Does anyone know where i can buy one of those neat plastic-compound 3M abrasive wheel thingies?

tommudd · **Posted:** Wed Jun 11, 2008 5:07 pm

WGNMANinaRENEGADE wrote:

YOU can partially drain the diff using one of those little pumps that fit on oil jugs. might need to put an extension on it to reach the bottom [i can't remember right now]. just siphon out all you can.
i used a very small bit of white gas to thin it out when i got near the bottom- let it set a little, then continue siphoning.
you won't get 100%, but you'll get most of it, then put in your new stuff. i stuck with the heavier recommended stuff since i was sure i had a thimble-full or 2 of white gas left rolling around the bottom.
oh yeah, and from an old thread here- if you even think you have the trak-lok or other type of locking diff, USE THE FRICTION MODIFIER! you don't want to hear what it will sound like if you don't...

Don't be lazy pull the cover off and clean it out good, one of the reasons you are changing it out is to remove any particles from the bottom, if you only stick a tube in there it is not cleaning it out! Takes 5 more minutes to do it right IMO!!! :wink:

Tom

jsc7002 · **Posted:** Wed Jun 11, 2008 5:52 pm

what does everyone use the the bolts when they bolt it back up? do you use thread lock or just anti-seize?

tjkj2002 · **Posted:** Wed Jun 11, 2008 6:05 pm

jsc7002 wrote:

what does everyone use the the bolts when they bolt it back up? do you use thread lock or just anti-seize?

Non,the RTV will keep them bolts in good,trust me the RTV used to seal the cover will get in the holes and keep them bolts in there.

Sir Sam · **Posted:** Wed Jun 11, 2008 6:33 pm

jsc7002 wrote:

what does everyone use the the bolts when they bolt it back up? do you use thread lock or just anti-seize?

Use both, just to be sure. :twisted:

jsc7002 · **Posted:** Wed Jun 11, 2008 7:04 pm

what is the difference between the red and blue RTV?

Xodius · **Posted:** Wed Jun 11, 2008 7:45 pm

Communist and American?

jeepkj02 · **Posted:** Wed Jun 11, 2008 8:24 pm

I like using ultra black. A bottle pump helps when refilling the diff.

tjkj2002 · **Posted:** Wed Jun 11, 2008 8:47 pm

I like ultra gray,never had any issues with it.

Dje Ryu · **Posted:** Wed Jun 11, 2008 9:18 pm

red RTV withstands higher temps than blue, I believe.

rangerd77 · **Joined:** Sat May 03, 2008 10:48 am **Posts:** 512

jsc7002 wrote:

Im about to change the fluid in my rear diff. but I cant seem to find where I put the oil back in.

is it this? and if it is what is the rubber cover thing??

what the hell is that red thing over your diff? i want one

jsc7002 · **Posted:** Wed Jun 11, 2008 11:13 pm

lol you can get it from Jeepin By Al, but you dont need it, its for the 6" lift

Jeep4me99 · **Posted:** Thu Jun 12, 2008 6:31 am

Thats the JBA Y-link extension. It helps relieve stress on the rear ball joint. It also helps reset the pinion angle after a lift. Its really only needed on 4+ inch lifts, but it help get rid of rear drive-line vibe for me.

Because I like to sound stupid.....

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