ISSPRO Trans Temp malfunctioning - Ford Powerstroke Diesel Forum
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Old 02-05-2014, 12:29 PM
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ISSPRO Trans Temp malfunctioning

I was coming home today from work and entering my neighborhood I drove through a large puddle, and when I had finished backing up my driveway I was surprised to see that the gauge read almost 160 degrees. Before today the gauge was pretty much useless because in the ten mile drive home from work, it wouldn't even budge. Could the water have affected the sensor or connection or is my trans really getting that hot?

I highly doubt it is the trans as like I said, it barely even gets hot on the commute to work, especially with the weather we have been having.

If I contacted ISSPRO do you think they would send me a replacement sensor for free?

Thanks
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Old 02-05-2014, 01:40 PM
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More than likely, you just got water in the sensor. You may try getting the water out of the sensor connection and the wiring harness connection (WD-40 works well for this) and then plug it back in. You may want to consider adding dielectric grease to this connection to prevent moisture from getting in this connection.

I've recently done some reading on this subject, and it seems to be a common problem at that sensor location.
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Old 02-05-2014, 02:10 PM
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Yeah that's what I figured cause it's mounted like right in the splash zone. Thanks for the help man.


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Old 02-05-2014, 02:54 PM
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Let us know if you still have problems. One caution is to clean out the WD-40 after you get the water out, since the WD-40 will never dry and can collect other debris (like dust) that could become an insulator. You could also just try using compressed air to get rid of the moisture or a contact cleaner.
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Old 02-05-2014, 02:57 PM
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Some people say that WD-40 should never be used around electronics, but I know it's used all the time. So I guess, use it if you feel safe using it, or use something specific (Deoxit for example) if you can.

I should have cautioned this from the beginning, but now I feel obligated to say something to make sure you don't do something you may regret.
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Old 02-05-2014, 03:29 PM
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Maybe I'll just try to use to some compressed air to get the water out and then I'll put some grease in it to prevent it. Hopefully I can get it done tomorrow if the weather cooperates.
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Old 02-06-2014, 07:31 AM
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Please let us know if you happen to get it fixed. I bought my truck a few months ago and that gauge hasn't been working right since. It started as erratic so some sort of connection issue. I cleaned the sensor and reconnected and now it doesn't read anything :/.
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Old 02-06-2014, 07:36 AM
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Quote:
Originally Posted by winona78 View Post
Please let us know if you happen to get it fixed. I bought my truck a few months ago and that gauge hasn't been working right since. It started as erratic so some sort of connection issue. I cleaned the sensor and reconnected and now it doesn't read anything :/.
Where do you live? If it's really cold outside mine usually doesn't read anything at all unless I drive it for an extended period of time. Even then, when it's really cold out (under 20 degrees) it doesn't read no matter how long I drive it.
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Old 02-06-2014, 07:46 AM
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Im from Wisconsin so it is pretty cold out right now. Since I removed/cleaned it, it has been reading <100. Maybe I did end up fixing it after all.

Thanks for the info!
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Old 02-06-2014, 07:51 AM
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Usually the trans should be running about 80˚ above ambient temp. So if it's anything below 20-25˚ F outside and you have a 100˚ gauge, it usually won't read.
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