Found AutoZone, Bought Cheap Tool WAS 016 Hex Plug...

[John Larson]

"I caught all the fluid, it was a dark chocolate color and the smell was, 
er, yucky.  I now have all plugs out/loose and am letting the transmission 
drip dry for a while before refilling through the engine compartment with a 
long tube and a funnel."

"Yucky" ?   That's how most gear oil smells.  Many, including old type 
Kendall (one of the best!), look the way you describe.  Be SURE the gear oil 
you use in the tranny is "GL-4" and the oil you use in the rear diff is 
"GL-5".  No mixes, no combos, just the straight type.  Gear oil doesn't 
suffer from the deterioration motor oil does, so changing it (other than to 
look at the magnet) is basically an exercise in wallet lightening.