Mark:
On the models without the vacuum modulator, that rod is referred in manuals as the "throttle pressure rod", and that's what it does, along with the kickdown. On the modulator equipped trans (came along in the '60s Cruisomatics) the rod is the kickdown rod, as you say. On those, there is usually an adjustment screw, accessible through the vacuum hose fitting, that can adjust the shifts.
I still use type F or FA fluid, you will get varying opinions on this issue. Your converter will drain with only one plug out, but it takes longer since the air has to get into the converter through the front pump.
John - "The Hoosier Hurricane"
