Tom, I haven't tired of using the hand pump for gear oil yet. I *did* tire
of re-filling the quart bottles tho', so now I use it in the gallon jug. It
won't evacuate the whole jug, but that's OK with me if I can fill a t-case
in one trip under the truck.
Mostly I grew tired of the pump getting greasy/oily, and me having to
use one hand to hold the output tube in the transfer case, and wind up
holding the jug against my chest and using my other hand to pump it..
which resulted in Tom covered in oil. The pump always seemed like it
took some effort to work it, too, and there's not a lot of room for
leverage under a vehicle (then again, most of 'em are taller now..).