4l60E Temp Gauge

[tyhuck]

Ive got an Autometer transmission temp gauge on my 05 Silverado that is installed into the diagnositc pressure port on the side of the transmission case. I had my trans rebuilt over the summer and the builder said that i wouldnt get an accurate reading through that port because the fluid doesnt circulate up to that port. My questions is, how accurate is that statement, and how much difference could I get between the fluid temp and the temp shown on the gauge?

[aflesch]

He is correct. While that port is exposed to line pressure it does not have fluid actively flowing past it. It's hard to say how much of a temp differential you will see between that port and say, the pan. IMHO you should have a shop weld a port in the side of the pan to install the sensor. (Just make sure the sensor is not going to hit anything when it goes in.)