· Retired Moderator
The fill plug in your Jeep is rubber, it just pops in and out. When you take the rear cover off (just take all the bolts out around the outside) you will probably have to hit it with a hammer or something to break it loose. Once it's off and the gear oil has drained out, you can scrape the RTV silicone off the cover and the axle housing. Then you will want to put about a 1/4" bead all the way around the opening, and bolt the cover back on (I usually use Blue RTV silicone, just ask for it at the auto parts store, they will know what you are talking about). At this point there are mixed messages; I usually just install the cover and then fill with gear oil, but some people will tell you to let the RTV dry for 24 hours before refilling. If you have the time, go ahead and let it dry, otherwise fill and go! Good luck, hope this helped more than it hurt!