Sensor is in the trans pressure sensor.

Basically, the idea here is to look and see what the PCM thinks is going on. Next step would be to see what the trans temp actually was, if the sensor says the trans is getting hot. Likely an IR temp gun is going to be your best bet. You'll have to stop, and shoot the trans to get a reading though. (at which point, it will likely have cooled some.) Most of the aftermarket temp gauges aren't going to be incredibly accurate, depending on just where they read the temp from.

 

I have an IR temp gun to read temps. I will try and measure the temps when it acts up. I have read about the add-on temp sensors and I figured they were wildly inaccurate depending on where they were mounted. I'm going to try and see if I can get an actual temp from a live scanner. I would suppose this would be the most accurate reading directly from the actual trans temp sensor.

 

Assuming the sensor is actually reporting the correct temp, yes.

 

The best spot to put the temp sensor is in the line that goes to the cooler. Using the test ports are junk

 

Does anyone have any pics of how they mounted their temp gauge sender to their trans lines? I'm thinking add a temp gauge to my truck to accurately read my trans temp.

 

There are clamps that will hold the temp sensor to the line, made of aluminum, so the conduct heat fairly well, but will still read a few degrees low. Other option would be to plumb in a T in the line, so your sensor can read the fluid directly. That would be fairly accurate. On the 95 and older trucks, trans temp sensor was an option, and the line going from the trans, up to the cooler, had that fitting already in the line. If you could find one of those..... most of the work would be done already. (and less chances of leaks.) Installing the line would probably be more work than cutting and splicing the existing line though. Kinda tight quarters under there, especially if you have a 4x4.

 

I replaced the trans cooler line and took out the check valve. Can I remove this and put a tee fitting in to use for the sender for the trans sender? I checked both of these lines after driving with my IR gun and both read pretty low.

 

They will cool some that far forward. You want your sender is close to the trans as possible.

 

But it is that same line, right? I'm pretty sure but just want to make sure.