Seems like time for some steel wedges.
Two of them for about 5 dollars each, you can turn a big
stump into smaller pieces, suitable for picking up and tossing
into the back of a truck.
Not one of the sledhammer style mauls, they get stuck in the
wood too easily.
Put one of the wedges along the side near the cut portion, drive it
in with a sledge, then drive another along the split and pull the
first one out, and repeat the process, etc.

Mark and Kim Smith wrote in message
...
Thanks for all the suggestions everyone! The ax was my best friend on
this job. Now I just need to figure out how to get the thing up to the
bed of my truck. (Time to think like the Egyptians.) I guess I could
borrow a cherry picker (engine lift.) Once in my truck it can be
forklifted into a dumpster. Bent my hitch a little, too (1/2" steel
plate.) But those are cheap enough to replace. The receiver still
looks great, as does the hitch pin! Colbyt had mentioned to find and
cut the brother or sister to one of the big roots on the back side.
Heck!, there was a brother, sister, mother, father, first cousin, etc.
But she's out now! Thanks again for all the suggestions!!
http://www.bunchobikes.com/tree.htm