While crawling underneath the rear of the Jeep (my 06 TJ SE with ~57k miles - no lift & mostly highway driving w/ some light highway action) I noticed that my rear diff (Dana 35) seems to have oil around the gasket, in addition to the terrible rust issues.
Is this something I should be concerned about? I've read through the writeup on how to service the diff's here - Jeep Axle Differential Fluid Change Service - it doesn't seem like something that would be out of my leauge, I'm just concerned about snapping off a bolt.
When was the last time you changed fluids according to jeep it should be done every 24,000miles, so it's time it would be a good thing to fix. As far the cover that is normal especially if you live some where they use salt, I would just sand it down to bare metal and repaint it black when you change diff fluids. As far as the seepage that is probably do to the RTV leaking a little, once you clean, and reseal it should be fine.
2003 Jeep Wrangler Rubicon
4.0L, 42RLE, Dual Tops, Full Doors, JKS Front Disconnects, Cragar Soft 8 Black Wheels, 33x12.5x15 Goodyear Duratracs, .75" Front Coil Spacers, Bushwacker 6" Flat Fender Flares, Skid Row Steering Box Skid, LubeLockers, Rubicon Locker Mod, OBA, Cobra 19 Ultra III CB, 3' Firestik, Rough Country 2.2 Steering Stabilizer, RC 1.25" BL, RC 1" MML, RC Grab Handles, Fog Lamp Bent Pin Mod, 4" Apline S Series Speakers, Kenwood Excelon 6.5" Speakers, 6.5" JL Audio 6W3V3 Subwoofer (in center console) w/MTX Thunder 202 amp, IPF H4 Headlight Housing, Sliverstar H4 bulbs.