Replaced the Front Differential fluid with synthetic... couldn't get the drain plug out (as so many others have found), so I just pumped out what I could, added a small amount of new, pumped that out, and repeated until the stuff coming out wasn't black. Then added the required 1.2 qt and am assuming that if I overfilled, the extra will come out the breather.
I gotta say though, old gear oil smells terrible - what's up with that?!
I also topped off the radiator and tightened my alternator belt. Waiting for warm weather and copious amounts of free time to put in a new rad, replace the belts (accessory and timing belt), and water pump.
Might just take on the transmission oil this evening... if I'm feeling motivated.