Transmission fluid HOT too quick? - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 03-21-2016, 07:20 AM Thread Starter
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Transmission fluid HOT too quick?

Hello all.
So I recently got an OBD wifi monitor to be able to read the essentials on my 2006 Ford F-250 6.0. I was reading my transmission fluid temp, and it was getting up there pretty quick. I did feel the truck a bit sluggish, but it got a bit better as ECT n OIL TEMP got hotter. Then my trans guage went to 280! I had read on another thread, that it should only reach 220 tops, and that's with towing. I am not towing anything. So I checked fluid and it seems to me full. Any idea on what the problem could be??? I don't wanna have to do a trans job. Big $$$$


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post #2 of 15 Old 03-21-2016, 09:48 AM
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I don't believe the trans would last very long at 280, so my guess is a bad PID or a biased sensor. Either way I'd get it checked sooner than later to make sure. Have you checked the temp prior to cranking after a cold soak? Did the fluid smell burnt at all?
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post #3 of 15 Old 03-21-2016, 10:24 AM
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^^^ What he said. PID is probably wrong.

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post #4 of 15 Old 03-21-2016, 12:16 PM Thread Starter
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Quote:
Originally Posted by G8orFord View Post
I don't believe the trans would last very long at 280, so my guess is a bad PID or a biased sensor. Either way I'd get it checked sooner than later to make sure. Have you checked the temp prior to cranking after a cold soak? Did the fluid smell burnt at all?

So I just checked my trans dip stick. My truck has been sitting for about 7 hours. And it's reading higher than the H level!?!? I'm not sure what to make of this. Can it be overfilled and having these issues??


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post #5 of 15 Old 03-21-2016, 04:31 PM
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It's likely that it will show over full after sitting for a while due to drain back. You are supposed to check it hot/warm while the engine is running. If it really is substantially over filled, it could cause some minor heat issues, but not like you're temps show. Did you check the temp after it sat for those 7 hours?

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post #6 of 15 Old 03-21-2016, 04:35 PM Thread Starter
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Originally Posted by G8orFord View Post
It's likely that it will show over full after sitting for a while due to drain back. You are supposed to check it hot/warm while the engine is running. If it really is substantially over filled, it could cause some monor heat issues, but not like you're temps show. Did you check the temp after it sat for those 7 hours?

Yes the temp was at about 150-160 when I fired it up at the end of my shift. When I got home, I checked it in neutral, and it read normal. If the trans was actually the 300 degrees it was marking, the fluid should have been hot to the touch. It wasn't ,and it read the level being in the middle


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post #7 of 15 Old 03-21-2016, 04:41 PM
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Bad sensor. Replace.
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post #8 of 15 Old 03-21-2016, 04:42 PM
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If the temp was at 150 after a 7 hour cold soak, you have a sensor or PID problem like I said before. Now to figure out which one. Are you using Torque? If so, there are two TFT PIDs. One works properly, the other usually follows ECT pretty closely, but your numbers do not make sense for either one.
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post #9 of 15 Old 03-21-2016, 06:06 PM Thread Starter
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Quote:
Originally Posted by G8orFord View Post
If the temp was at 150 after a 7 hour cold soak, you have a sensor or PID problem like I said before. Now to figure out which one. Are you using Torque? If so, there are two TFT PIDs. One works properly, the other usually follows ECT pretty closely, but your numbers do not make sense for either one.

I'm using a wifi OBD monitor for my iPhone. The app I use is OBD fusion. It also has PIDs specifically for ford. The temp for trans fluid is only available for the ford PID, there isn't another available. I tried the torque app for android. The problem I had with it was it dropped the HPOP data, it wasn't consistent.


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post #10 of 15 Old 03-21-2016, 06:07 PM Thread Starter
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Originally Posted by Patriot View Post
Bad sensor. Replace.

Bad sensor? Do you know how many the truck has? Is this a pricey part or a tough job? Or is it a weekend job? Thanks for the input by the way


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