ok, here goes after dissecting this thing and figuring out how it actually works here are my findings.
First off, please by all means use my pics on the front page, any info to help fellow jeepers is fine by me!
When I pulled it and give it a spin, it spun nice and smooth 5-6 times, no resistance/ hard spot found. I am not the original owner, I bought the jeep bone stock at 40,000ish Kms. I Don't see the original owner pulling it and lubing it himself, when I pulled it the first time, it didn't look like it had been apart before. However, who knows right?
As far as oil goes, I use 6quarts of Chevron supreme 10w-30 every 4000km. I am by far no oil expert and frankly, use the same oil my family has been using for years in their 4.0L.
After sitting down and really getting a good look at this thing. I can tell you that yes the black residue in the housing is the grease on the shaft. You can see from my picture that the grease is actually pushing up the shaft, over the ring, across the backside of the wheel and actually being flung around my housing. The ring under the wheel u can tell has been worn from metal to metal contact, but far from a "groove".
Ok, I pulled the stock grease plug out and found something I wasnt expecting. White material?? I thought it was white grease, but it seems almost like paper? Some sort of packing material? Im just throwing idea's into the wind here, wut else could it be for but to hold in the grease? Because when I blew compressed air into the hole. It did nothing but push back, went absolutly no where, because of course, that white material is blocking it from getting around the resovoir and through the holes to the bushing.
I don't want to sound like a total idiot, but the grease found on the shaft/in the housing smelt exactly like the white material found behind the plug. Im actually at a complete loss to what it is.
I know this is a terrible picture but looking down towards the bushings, u can see the black grease that was infact keeping the shaft lubed. Not well enough how ever as my shaft still changed color due to heat damage. As well as wear enough to scar the shaft itself. In the upper housing where the wheel/ sensor is, You can see the score marks along the wall where the shaft is actually worn out enough to touch the walls, as well as the sensor! I might add.
All and all I am extremly suprised it didn't let go, or at least give me any symptoms.
I hope I covered everything, and didn't sound like a compete noob in the process!