Thank you for the more detailed clarification.
I simply stated: "None of them will monitor trans temps because there is no factory sensor for trans temp to the ECU."
Which is correct, as you stated, but I know my UG will not monitor a separate TCU unless the ECU wants to allow that information...
I happen to prefer the UltraGauge. None of them will monitor trans temps because there is no factory sensor for trans temp to the ECU. The ones that do added a sensor.
Why did someone tell you to monitor trans temps? Are you intending to tow with it? What are your plans?
I monitor voltage...