I recently got my new ISSPRO guages installed and I am wondering where is the better place to install the transmission temperature sensor. I got the guages from Diesel Manor. The instructions showed the sensor being installed in the test port on the drivers side. However, when I had my transmission rebuilt, I installed a bigger pan and had the guy weld in a place to install the temperature sensor. This is the location I installed it, in the pan. Which location is more accurate? I have heard there can be up to 30 degrees difference between the two locations.
Best location for transmission temperature sensor
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Since oil breaks down under high heat, it is generally recommended that you monitor sump (pan) temperature, since this is where the oil is near its hottest. =Also, in the pan, you will get good oil "flow" or circulation around the sensor.
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... I installed a bigger pan and had the guy weld in a place to install the temperature sensor. This is the location I installed it, in the pan. Which location is more accurate?
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You should get almost identical temp from both locations.
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I have heard there can be up to 30 degrees difference between the two locations.
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I've never heard that from anyone who actually had senders installed in both locations. They all reported no difference in temps from those two locations.
The tranny pump grabs the ATF out of the sump and sends it on it's way through the tranny. The first place the ATF goes is to that pressure port on the side of the tranny. So both locations should have almost identical temps. And folks with senders in both locations tell us they do.
But we'll be glad to add you to the list of experts. Put a sender in both locations, with a switch to select which location you're monitoring. Or install a second tranny temp gauge with the sender in the other location. Then after your first towing trip, come back here and report your experience.
I have two tranny temp gauges, but my second one is in the cooler return line. It tells me that the temp of the cooled ATF is usually about 30º cooler than the sump temp when cruising on the interstate. But when I slow down to go through a town, the difference disappears, and the cooled ATF may even go higher than sump temp.
... I installed a bigger pan and had the guy weld in a place to install the temperature sensor. This is the location I installed it, in the pan. Which location is more accurate?
[/ QUOTE ]
You should get almost identical temp from both locations.
[ QUOTE ]
I have heard there can be up to 30 degrees difference between the two locations.
[/ QUOTE ]
I've never heard that from anyone who actually had senders installed in both locations. They all reported no difference in temps from those two locations.
The tranny pump grabs the ATF out of the sump and sends it on it's way through the tranny. The first place the ATF goes is to that pressure port on the side of the tranny. So both locations should have almost identical temps. And folks with senders in both locations tell us they do.
But we'll be glad to add you to the list of experts. Put a sender in both locations, with a switch to select which location you're monitoring. Or install a second tranny temp gauge with the sender in the other location. Then after your first towing trip, come back here and report your experience.
I have two tranny temp gauges, but my second one is in the cooler return line. It tells me that the temp of the cooled ATF is usually about 30º cooler than the sump temp when cruising on the interstate. But when I slow down to go through a town, the difference disappears, and the cooled ATF may even go higher than sump temp.
I put mine in the trans cooler line that comes out of the front of the trans. It is the cooler feed line that comes straight out of the converter. You can tap into it with a compression fitting and if you can find the right one, you won't need any goofy adapters to resize the sending unit. The highest I have seen is probably 210 with 10k or so on the trailer in stop and go traffic with a really heavy foot. The temp comes back down pretty fast when you lift, so you can keep a better eye on things I think. The pan temp is ok to read, but if that is smoking hot, it might be too late already.
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