I originally posted this in another area but thought I'd park it where it would do someone some good or at least confirm my results of changing Diff fluid at 14,500 miles.
Changed my diff fluid today. Put in Mobile 1 75W90 GL-5 compatible
http://shop.advanceautoparts.com/web...bil1_7070039-p . Typically, the magnetic drain plug was coated with iron/steel filings just like the other pics. I didn't jack it up just laid on my back and filled first with the bottle then with a large syringe my wife gave me (she's a nurse). I used just over 1.5 quarts. I filled until I saw it run out the fill hole and then let it drain for several minutes, then put the screw back in.
I got new washers for top and bottom plugs.
Fluid was like dark chocolate and markedly darker than what I put in, which was a clear yellow color.