Thanks!
After testing, the harness shows continuity, without shorts to ground.
The solenoids tested within range, right in the middle of the road @ 5-6 ohms, as well as sol.E at 25 ohms
I have not yet completed testing for a short to voltage.
My suspicions right now are steering me towards the valve body itself, especially after electrical checks, and the lack of a code. I'm ordering some gaskets and will open it up. Hopefully something will be suspect in there. I'll throw a sonnax kit in it if I open it. It does feel as if a valve in there is slow or hangs, maybe from a broken spring, or leaky end plug, or maybe a worn bore or valve.
I just bought this edge (knowing of the trans issue) and It was a good deal in every sense, but that means I have not had much wheel time to diagnose it. Previous owner said he never has serviced anything with the trans before. Usually, when I fix stuff it doesn't get worse, so I have to find some enjoyment going through a trans that is unfamiliar to me. I've been intrigued by the idea that the solenoids are all built into a disposable plastic unit, flow tested and mapped, and replaceable as assembly across multiple automakers. Kinda amazing. The more I think about it maybe it's not a bad idea. More expensive up front, but If you are going to replace one solenoid there is some logic that they should all be replaced.
Anyways, Thanks again for the diagnosis help! Lets hope it warms up a bit. Much more fun, and much faster without the freezing temps.
Edit to add, I think it would be a good idea to check the range sensor at this point. I think I have correct directions for that procedure. If it needs replacement now is a great time.