You will need some black RTV to reseal the stock cover, clean the surface well and wiper it down with brake cleaner before applying rtv.. A rear diff doesn't leak from many places. Out of the ends of the axle potentially, pinion seal (near the driveshaft), the cover itself, or the diff venting fluid through the breather line that is on the passenger axle tube on the rear.

 

Yep. I pretty much verified its leaking from the seal around the cover. I got the heat resistant RTV. Will that make much of a difference?

 

I bought the re usable "lube locker"
no mess to deal with just clean the diff cover, wipe down the axle side, line up with the bolts on the cover and put the diff back together.

works great.

 

x2 on this. The reuseable part is what sold me on it.

 

It is very straight forward to do. I would just say do not torque the bolts to 30 ft/lbs or you will snap off the bolt head (ask how I know). Just tighten the bolts with a wrench.

 

thanks! ill use my imagination of what might happen and save ya the agony of having to tell the story.

 

Piss on black RTV. If you want to ENSURE it remains sealed, and NEVER leaks, pick up a tube of Right Stuff RTV. It's basically the superglue of RTV's, and, you actually don't even need to take the cover off to fix the seal with it. Just wipe and dry the area that's leaking, and put a dab of Right Stuff on your finger, and smother it around real well, and let it dry. You may want to wear a nitrile glove when doing the application, as it is a pain in the ass to clean up.

 

When you say super glue.. it get nervous. Is it really that adhesive? I plan on regearing within a year.. and dont want to have to take a welding torch to my diff just to get the cover off. Also.. I plan on swapping in a lube locker the next time I change the fluid.. so this is just temporary basically.

 

The "right stuff" is very good, necessary? I don't personally think so. I have used it with great results, but regular black RTV will do just fine on a diff cover. That stuff is also ~$15/can as well.

It's not an adhesive, it's just a very high quality RTV I guess you can call it. I would use it on an oil pan or something that has less than ideal sealing surfaces. I used regular black RTV on my 'Cuda rear axle about six years ago, not a drip...

 

got it sealed up with the extreme black rtv or whatever its called. no leaks. i will probably order a lube locker in a couple weeks for next time. thanks guys.

 

I just like keeping things clean and easy. I pull a 1800lb trailer daily with the JK on 37's so I like to pull the cover once a year and check things out. That and I play in the water a lot.

 

I have a leaking rear diff cover also, took it to the dealer and he said it was fine , don't worry about it. Holiday weekend and it is still leaking, so I cleaned the area (around the 8:00 oclock position bolt on the cover) and applied clear silicone sealer. Will this hold or should I get something else, like what you wre talking about? I am on vacation so can't pull the cover. Need a quick and easy fix.

 

there's no easy fix. you have to pull the cover scrap the old gasket and apply a new one.

 

x2 for the Right Stuff. It works well, used it on many past reseals.

 

On my LJ no amount of black RTV would ever stop the rear Dana 44 from leaking. My guess is that it was a casting issue where there was just too big a gap someplace for the black RTV to fully seal. Sticking one of the Lubelocker gaskets to the diff side of the assembly with the black RTV (for ease of assembly) then attaching the cover did the trick, though. Haven't dripped a drop in the past four years since I did that to the LJ, yay!

So anyhow, it's a Jeep, and sometimes Jeeps like to mark their terrory (heh!). If re-sealing it with black RTV doesn't fix it, then invest in one of those Lubelocker gaskets. They aren't cheap (at least not from Quadratec, where I bought mine), but they do seem to work.

 

I had the same problem (leaking diff cover) and I used the black RTV about 2 months ago and it is still holding. Still trying to find a Jeep dealer that will fix it, they all say they don't see a problem.