Transmission temp sending unit
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Transmission temp sending unit
When my 2002 F250 SD powerstroke is cold (First stop in the morning) When the key is turned on to get the glow plugs going. My Transmission Temp guage reads 1/4 or more. When the truck warms up it goes to about 1/2 way. Never more than that.
Here is my question. I can go to motor alldata and find a wire labeled 'trans temp coming out of the transmission. It tells me nothing more.
What I want to know is if there is an actual sending unit or part to replace that sends trans fluid temp to the guage or a control unit.
I asked this question a while back and the only resonse I got was to buy Aftermarket guages.
Please dont tell me how the guages lie and how I need a guage set. Even when I get the guages it will bug me that the guage on the dash reads so wrong. So my intention here is to get the dash guage working correctly or give a beter reading than 1/2 when the truck has not been run for 12 hours.
Thanks.
Steve
Here is my question. I can go to motor alldata and find a wire labeled 'trans temp coming out of the transmission. It tells me nothing more.
What I want to know is if there is an actual sending unit or part to replace that sends trans fluid temp to the guage or a control unit.
I asked this question a while back and the only resonse I got was to buy Aftermarket guages.
Please dont tell me how the guages lie and how I need a guage set. Even when I get the guages it will bug me that the guage on the dash reads so wrong. So my intention here is to get the dash guage working correctly or give a beter reading than 1/2 when the truck has not been run for 12 hours.
Thanks.
Steve
Fleet Owner
Joined: Jun 2004
Posts: 25,090
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From: Rio Rico, AZ.
I would also like to have my engine oil pressure guage be a little more than a fancy idiot light as well.
I spent some time studying the current path of the temperature sender in the transmission. According to Helminc the current path for the guage goes through the PCM on the way to the temperature sender. There is NO DIRECT LINK to the sender for the guage. It is a translated reading. You only get to see what the PCM wants you to see. So the factory guage is about as good as reading the National Inquirer for your daily news.
If you want true accuracy, you must buy aftermarket guages.
I spent some time studying the current path of the temperature sender in the transmission. According to Helminc the current path for the guage goes through the PCM on the way to the temperature sender. There is NO DIRECT LINK to the sender for the guage. It is a translated reading. You only get to see what the PCM wants you to see. So the factory guage is about as good as reading the National Inquirer for your daily news.
If you want true accuracy, you must buy aftermarket guages.
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Joined: Jul 2003
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Originally Posted by priv8pilot
What I want to know is if there is an actual sending unit or part to replace that sends trans fluid temp to the guage or a control unit.
When you get that done, it isn't going to make any difference on your factory gauge. The gauge reads that way because the software that controls the gauge is programmed to read the way it does. If you use a scan tool and look at the output of the sender in the trans it reads real temps, and it makes sense. I've done it on mine, and it reads within a couple degrees of the ambient temperature first thing in the morning. It warms up slowly, too. The dash gauge starts part way up and is right in the middle almost immediately.
If you want to read real temps, get aftermarket gauges. The factory gauges don't do that, and there is no simple way to fix them.
hehe!
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jclark4cs
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Mar 19, 2006 10:15 PM
2002, 2086, 73, f250, f550, ford, location, sender, sending, temp, temperature, tempurature, trans, transmission, unit
