Q: My understanding was that these units are upgraded with the latest firmware so that they can show transmission temps? Where can I access this information?
A: Would need to know your year, make, model. But if you are asking about the VW EuroVan the trans temps are not programmed in. You need to do a simple program to add this gauge. The procedure is here: https://www.scangauge.com/support/x-gauge-commands/volkswagen/