"Yes, you are correct in thinking the solenoid is activated even when the unit is locked out."
THAT's what I wanted to know.
Disturbing as it is ....
That solenoid shouldn't be pulling juice for nothing during those times when you don't need it. It's downright wasteful!
I referred back to the schematics in my '65 Motors manual, and they show no manual dash switch like the Borg Warner schematic does. I'm going to keep the manual switch for those long hauls in direct drive. Then I'll add a relay and tie in the governor.
Rusty has taken me from South Texas to the pike national forest and also to the Atlantic Ocean, all without a kickdown. (I didn't mention He's got a 283). Mr. Jackson who built this transmission for me back in 'o3 warned me that using freewheel as a passing gear is hard on a set of particularly small needle bearings somewhere, so I'm not in the habit of using it that way anyhow.
I like those fentons on your GMC, I put a set on my '59 Viking short bus to replace a cracked manifold, and they sound great!