I've been trying to pin down this sound... A dying cow, huh?  I grew up on 
a
cattle ranch/ hay farm / dairy/ sawmill opertion farm in the Black Hills 
and
have been trying to figure out what can sound like a cow in a car.   They
either moooo-ed, nawwww-ed or bellowed.  I've seen them die, too.
Must be something like a drawn out MOOOOO... huh?
Do you suppose somebody put an a-oogah horn on that old Rambler and the 
damn
thing just needs a little adjusting or a new battery?  Or maybe need horn
adjustment.  Maybe has been just been stuck too long.
Or maybe something to do with air intake, vibrating somehow.
Maybe just should get a second opinion there on that sound.  Maybe get a
piece of hose and make like the stethoscope thing...
Now that Bush is back... I let things like this bother me.  I should get a
life, huh?