Shopvac oil suction chamber, $6 of tubing & I had the bucket. Don’t have to snap the lid down, the suction holds it down. A vacuum 1.25” adapter fits perfectly into the bucket screwcap. All the oil goes in the inner jug, not a drop of “mess”. Notice the vent hole in the inner jug.
Used clear vinyl tubing 5/16 inner diam to poke into the front diff. I doubt the next size bigger will go in.
If a ring gear bolt blocks the hole, roll truck about 4”. Takes ~10 minutes to suck out cold oil.