Originally Posted by zguy1

How are folks reading transmission temperatures in 2023? The tech in our trucks haven't changed, but we are all walking around with computers in our pockets.

The last time I needed to read my transmission temperature after a drain and fill, I used a friend's ScanGuage. Unfortunately I do not have access to it this time.

I think I should be able to use a jumper wire on the OBD2 port in conjunction with one of the lights on the dash to check the temperature, but I have never tried to do this yet.

I really don't want to buy a ScanGuage. I would rather buy some Bluetooth OBD2 scanner and use my phone to read and display. Btw, I am using an iPhone as opposed to an Android device.

Would like to hear your opinions on the following:

1) What method are you using? E.g., jumper (assuming that is valid method) or OBD 2 scanner.

2) How does the OBD2 scanner like a ScanGuage read the temperature? Does it reference a memory location to calculate it? If the ScanGuage can do it, then I assume any OBD2 scanner can do it assuming you can enter an advanced function to do so.

thanks!