Originally Posted by Ray B.
I checked the ScanGauge website and see that the gauge works by connecting to the OBDII diagnostic port on the vehicle. Is there an extra step to get the transmission temperature that would require the talents of a vehicle mechanic?
I use the Torque app
on my smartphone to monitor transmission temperature on my 4Runner. I had to enter a two custom PID's in the app to get it to display the transmission cooler outlet temperature and torque converter outlet temperature; message me if you want the code. I think the app was <$5 (can't tell in Play store because I already paid for it) and you had to buy if you wanted to input custom PID's.
I connect to the car using a Bluetooth OBDII connector
that I bought off Amazon for $20.
When I researched the Scangauge in the 4Runner forums
it sounded like you needed to purchase additional custom program to see tranmission temperatures. However, those articles were older so the Scanguage may have been updated since then.
It should be noted that the Torque app uses lots of battery power when running and my phone gets quite warm. I typically only start the app when I know I will be climbing lots of hills and I have found that I don't use it that much.
I described my first experience towing with 4Runner and the transmission shifting and temperatures here: New Owners of a 2008 Escape 17B