97 7.3 e4od torque converter unlocks every now and then - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 3 (permalink) Old 06-17-2018, 08:32 PM Thread Starter
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97 7.3 e4od torque converter unlocks every now and then

Trans was rebuilt 4 years ago probly only has 15,000 miles on it never gave me a problem but I just put a new motor in the truck and have put about 400 miles on it babying it for brake in and last night I noticed the torque converter kept unlocking at 55mph and then would come back in and then it came out of overdrive for a split second then went back in and then acted fine. I drove it 45 miles today not a single problem then all the sudden it did it again and when I left a light it was holding on to gears long and wouldn't #### and flashing overdrive button. But after I shut it off for about an hour it was fine again i feel it electrical but didnt no if someone else knew. Thanks
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post #2 of 3 (permalink) Old 06-18-2018, 02:25 PM
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Location: SE Florida
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Re: 97 7.3 e4od torque converter unlocks every now and then

So do you have two problems, one that it won't stay locked, and two, it's shifting in and out of overdrive?

You need to get the codes read. The flashing overdrive light means codes have been stored to tell you where to start looking. Without the codes, all I can tell you is that something is wrong. The places that read codes free CANNOT read these codes. You need a good independent shop or a Ford dealer.

Former Ford Automatic Transmission Engineer

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
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post #3 of 3 (permalink) Old 06-23-2018, 08:24 PM Thread Starter
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Yes torque converter will unlock or stay locked and will some times just have no gear. I got it scanned had a code for speed sensor. I replaced that put 150 miles on with no problems then started doing it again
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