Transmission Temperature Gauge
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Laughing Gas
Joined: Aug 2003
Posts: 836
Likes: 9
Transmission Temperature Gauge
Installed EGT, Trans Temp and Boost gauge today. Took the truck for a short 15 minute test drive. boost and EGT came up right away, Trans temp did not seem to move? Starts at 100 degrees. It was cool out about 45 degrees. I have a 1999 F250 7.3. I installed a 6.0 cooler two weeks ago. But would be interested in learning how long it takes others to get trans temp up.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,741
Likes: 2,669
From: SE Florida
The transmission takes a lot longer than the engine to warm up. It will take even longer with a 6.0L cooler. On a 45°F day it can take over 10 miles to hit 100°F.
Lead Driver
Joined: Jun 2003
Posts: 8,298
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From: Damon (South East Texas)
I have been monitoring my trans temps with an Autometer trans temp gauge with sender in the test port. I also have an Aeroforce Interceptor gauge monitoring the TFT sensor. I see about 20* warmer temps at the TFT sensor. Would the location of the sensor cause this much difference? I am going to switch out my Autometer gauge for the Interceptor later in my gauge pod. I have temporarily mounted the Interceptor under my brake controller until I have gotten used to the trans temp reading and what is considered "normal". I have the annunciator set to alert me if the trans temp goes too high.
Senior User
Joined: Oct 2010
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i to also just did these mods and i took a 60 mile drive yesterday and only saw about 130 on my trans temp it just takes a long time to warm up.
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Laughing Gas
Joined: Aug 2003
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15 miles into town, run around town for 30 minutes then 15 minutes back. No freeway speeds, outside temp in the upper 40's and the trans temp needed if it moved at all would have been a needle width off of 100. So, either it isnt working or it's too cold out or my new 6.0 cooler is working really good.
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,741
Likes: 2,669
From: SE Florida
Yes, it can. I've seen it cooler at times, but usually the sensor on the solenoid body is 10-20°F warmer than the port.
Lead Driver
Joined: Jun 2003
Posts: 8,298
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From: Damon (South East Texas)
Thanks for the info, Mark. I was starting to doubt the accuracy of my gauges. This puts my mind more at ease when I swap out the gauges.
Logistics Pro
Joined: Apr 2010
Posts: 4,446
Likes: 26
From: Panama City, FL
Does anybody have a pic of the trans test port? Im not sure I have mine hooked in the right place. I never see mine get above 130, even in the HOT summer days in SC. I have mine hooked to the drivers side of the trans, not sure if its the trans test port.
Go Bills !
Joined: Jan 2008
Posts: 2,778
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From: Buffalo, NY
Senior User
Joined: Nov 2008
Posts: 103
Likes: 0
From: Baltimore
This fall, I installed a trans temp gauge in the test port and I haven't seen that needle move either. I tow quite a bit and am pretty confident that the trans temp has gone above 100*. The ISSPRO EV2 boost and EGT gauges that I installed at the same time work well. I'm getting power for the lights at all the gauges and my dimmer works.
I have been meaning to pull the trans temp gauge pod to make sure that I've got a good connection for the temp sensor. I was planning on using a multimeter to confirm that I have connectivity between the gauge plug and the plug at the sensor.
Beyond that, what else can I, and the OP, check to confirm that the sensor is good and working?
I have been meaning to pull the trans temp gauge pod to make sure that I've got a good connection for the temp sensor. I was planning on using a multimeter to confirm that I have connectivity between the gauge plug and the plug at the sensor.
Beyond that, what else can I, and the OP, check to confirm that the sensor is good and working?
Go Bills !
Joined: Jan 2008
Posts: 2,778
Likes: 65
From: Buffalo, NY
A simple check, Warm up a pot of boiling water and your wifes temperature gauge. Then dip the sensor in the water. Compare the difference between your wife's and the trucks gauge. May have to run a temporary ground wire to the sensor depending on what sensor you have.
Fleet Owner
Joined: Mar 2007
Posts: 28,313
Likes: 6
From: BLT, MN
This fall, I installed a trans temp gauge in the test port and I haven't seen that needle move either. I tow quite a bit and am pretty confident that the trans temp has gone above 100*. The ISSPRO EV2 boost and EGT gauges that I installed at the same time work well. I'm getting power for the lights at all the gauges and my dimmer works.
I have been meaning to pull the trans temp gauge pod to make sure that I've got a good connection for the temp sensor. I was planning on using a multimeter to confirm that I have connectivity between the gauge plug and the plug at the sensor.
Beyond that, what else can I, and the OP, check to confirm that the sensor is good and working?
I have been meaning to pull the trans temp gauge pod to make sure that I've got a good connection for the temp sensor. I was planning on using a multimeter to confirm that I have connectivity between the gauge plug and the plug at the sensor.
Beyond that, what else can I, and the OP, check to confirm that the sensor is good and working?