Well.... FINALLY got the TPIS system working as needed.
What a royal pain in the ********...
To save others the migraine.... The sensors that COME WITH THE TRUCK IN THE STOCK WHEELS are the ONLY ones that will work! Period!
I tried the clonable Autel MX, and a brand new set of OEM sensors from the dealer with the same part # as what's in there, and nothing...
As of 5-20-2020, the DEALERS don't even have the software to reprogram the 2020s yet (called another one to verify after local dealer told me and they said the same thing). Lifetime pro mechanic friend with the fancy pants Snap On gizmo didnt have it either. No Release date either.
The whole "Auto Relearn" thing mentioned in the manual and by the dealers is for rotation only, NOT introducing new sensors on the truck.
Long story, and many swaps later, the sensors that originally came with the truck are now in the Buckstop wheels with the MPT81 and working perfectly (100 mile test drive). Accurate within 2psi on 2 external gauges.
What a huge sigh of relief, hopefully this helps other building a new ram converting from DRW to SRW