Thanks for the info Zip. I didn't think to look behind the conductor plate or TCM. I'm sure you can tell I don't know much about electrical systems compared to the mechanical systems. As far as electrical diagnostics went, we tested the pins on the old conductor plate, and the N2/N3 (not N1/N2) sensors indicated a problem. The OBD specifically pointed towards the N2 and N3 sensors. I'll look into the CAN bus post and look for potential origin sources there.
It was a complete replacement of the plate, new solenoids, filter, gasket, and all. I did not check the wheel speed sensors; we only checked the conductor plate.
Do you know if there's some trigger that causes it, or does it just happen from a connection going bad?

The previous diagnosis and repair were made:


Red is where I need to look.
Green is the connections I checked.
Yellow is also what I tested with the proper power inputs, and replaced the Transmission Solenoid Assembly.

Let me know if this is correct. Thanks.