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Not sure if that is the problem or not, but the truck starts fine and drives fine. Once I get down the road a few miles the tranny temp gauge drops to zero and the tow haul light goes on and off. Sometimes the tranny temp goes up and the light stops blinking but only for a few seconds. The truck doesn't seem to drive any differently once all this happens. It shifts fine and it drives fine. It all happened just before I deleted my egr. I changed out the tranny filters and oil after the egr delete. The new oil is nice and red and doesn't stink, so I'm kinda ruling that out. I was thinking maybe the thermostat was the culprit, I'm not sure though. Anyone have any similar problems?
 

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It is more the likely the tranny temp sender. It's a somewhat common issue. You will need to drain the trans oil and remove the oil pan, just like if you were doing a filter change. The trans temp sender is towards the front of the valve body. It's a little 2 wire sensor. You just turn it to the left and pull it out. I just did one the other day and the sensor is only like 15 bucks.
 

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Just started having the same problem today except my temp goes way hot and the tow/haul light flashes. Then goes to normal sometimes. Also is your check engine light on?
I've got these if we have the same problem
PO700 Transmission Control System malfunction
PO710 TFT circuit range/performance problem
PO713 TFT Sensor Circuit High Volgate Input
 

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It's the temp sensor, mine done that a week ago. It's a $15 part and takes all of 45 minutes to change(draing and removing the pan takes the longest) To get the sensor out turn it counterclockwise and pull(use a pair of pliers because it is slippery and very gently pull) A quart or so of fluid will come out of the hole so be prepared and claen off the connectors on the plug, they need to be dry to make a good connection.

And check the wiring harness that hooks to the sensor for chaffing and bare spots as well.
 

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trans temp gauge problem

hello everyone. I am about to buy a 2004 excusion 6.0 always wanted one its done a 100,000 miles but its tidy. but for one worrying thing. I have read the posts here and found them to be great. except the gauge on this does not work at all, according to the owner its the gauge in the dashboard that is broken, as he has already replaced the sensor in the trans, am I about to be errrr stitched up with what would be a very nice tidy none working wreck if the trans goes here in Europe . advise any one
cheers steve.
 

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Im having same problem ford 350 lariat 6.0 2003. I been having my gauge shoot up to as high as it will go in the red which puts me in limp mode. Then it will go down to normal. It's been doing this about 3 days.tjrn this morning I noticed tranny fluid on the ground it looks like it's leaking near my transfer case. I got new sensor and filter which I will be switching out tmmrw. Any advice thanks
 

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Just to add my two cents to the post I had the same problem a few months ago I have a 2003 F350. Trans temp would drop to zero then stabilize and sometimes read high and the tow light would flash. I looked online and like everyone else I changed the trans temp sensor 3 times I had the same recurring problem. It would work for at most 1 week or a few days and back to the same thing. Can't remember which forum it was but someone suggested to change the transmission wire harness which I found I had nothing to loose. There is an update on the wire harness in which the new harness comes with 9 connections as opposed to the original 13 I believe. The new harness eliminates the use of the pressure sensors ( I believe that's what they are called) on the valve body which were never used for anything. I changed those sensors to caps I bought else where put everything back and the problem went away.

Sent from my SM-G955U using Tapatalk
 
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