So... after doing several diff fluid changes now, and getting REAAAALY tired of figuring out how to empty the whole jug... especially my rear D44 that is mounted just right for the darn gas tank to be in the way.
So I went on a mission...
There had to be something out there to make this a simple task...
And then the answer came while wandering the aisles of Salvo daydreaming...
Fluid transfer pump...
http://store.summitracing.com/partdetail.asp?part=wmr-w1145
This is a link to summit for the same exact thing... but Salvo had it on the shelf, as did Harbor Freight...
It is a dream come true... emptied an entire quart of fluid in about 5 pumps... refilled front diff with almost 2 quarts in about 5 minutes... including putting the plug back in...
Now no need to be a contortionist to figure out what angle you need to put the bottle/funnel etc.
Just 1 hose in the jug, and 1 in the diff... then pump away...
Better yet... small enough to take with me on the trails
Hope it helps...