Transmission temp gage
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Tuned
Joined: Dec 2009
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Transmission temp gage
I recently purchased a transmission temperature gage for my 2002 E350/4r100 transmission. The directions say the probe/sending unit can be installed in the test port on the side of the transmission,in the line to the cooler,or to install a bung in the pan. Which is preferable? Does the test port allow fluid to flow past it? or is it mainly for pressure testing? thanks for any replies.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,722
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From: SE Florida
I recommend the test port. That will give an accurate reading of the internal trans temperatures.
When I was a transmission engineer at Ford I had many transmissions that were instrumented for temperatures. I had thermocouples all over the insides. I also always had one in the test port. The test port is generally hotter than the pan temperature, and cooler than the outlet to the cooler. It is a good average temperature to indicate how the transmission handles the heat.
When I was a transmission engineer at Ford I had many transmissions that were instrumented for temperatures. I had thermocouples all over the insides. I also always had one in the test port. The test port is generally hotter than the pan temperature, and cooler than the outlet to the cooler. It is a good average temperature to indicate how the transmission handles the heat.
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