Originally Posted by The Evil Twin
That WK site is so wrong so often it seems. I've noted several mistakes. Hopefully you didn't follow their torque spec for the drain and fill plugs. They are twice the true spec.
Anyhoo, the rear 230 ELSD is 1.6 qt upon assembly and 1.5 for a service fill if you get it hot and let it drain for a while. The front is 1.2 qt for assembly and damn close to that for service fill. I have just shy of 0.5 qt left over (out of 3) for the last service.
Interested in what you find out!
Just to follow up on that, I looked at the quart bottle of gear lube, and I have 5-6 oz. of lube left, out of the 5 quarts I bought, and again, that was after changing the front once, and the rear twice.
I had my Jeep up on 4 equal height ramps, and then the suspension in the OR2 mode, so I could easily get at the drain and fill plugs. The vehicle was fairly level, and I didn't want to simply pump in oil until it came flowing out of the fill ports. I learned that lesson in the front, when 1 qt. of oil was pumped back in, and at that point it did start to trickle out of the fill port. I kept a closer check in the rear, especially after I went beyond the supposed fill quantity of 1.4 quarts, and it didn't get anywhere near the bottom of the fill port. I continued to fill the rear axle until the fluid level was about 1/8" below the fill port. (I was allowing for the slight pitch of my garage floor)
Of course, that brings up an interesting thought....Should the fluid in the rear axle be 1.4 quarts, OR should the axle be filled until the fluid level is just to the bottom of the fill port? My previous experience has been with vehicles other than Jeeps, and on those cars, it was always to the bottom of the fill port. Could a Jeep be different??