Question about 1999 Ford F250 Regular Cab

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On my 1999 f250 automatic transmission the overdrive off light blinks and the service engine soon light comes on. The transmission seems to be working nomally. I have 66k miles plus and tow quite a bit. Do you think flushing the transmission might cure the problem?

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  • Ford Master
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Hi

It is important that you bring your vehicle to the dealer to have the codes read by their OBD scanner. The reason for this is that this fault can be caused by either the torque converter in the transmission or a simpler fault is sometimes associated with a faulty speed sensor.

The scanner will read the codes stored in the vehicles computer to identify the exact cause of this fault. It is important to have this vehicle looked at soon as serious damage to the transmission can occur if the torque converter is at fault and not operating properly.

Hope this helps. Please remember to rate my answer. Many Thanks.

Posted on Jul 29, 2009

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1996 honda accord wont shift into overdrive


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http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html

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http://schematicsdiagram.blogspot.com/2011/07/how-to-check-automatic-transmission.html

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http://schematicsdiagram.blogspot.com/2011/07/how-to-change-automatic-transmission.html

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This will help.

Thanks.

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1 Answer

I have a 95 f250 powerstroke diesel, automatic, since yesterday the transmission has been slipping between 3rd and overdrive. the problem started while hauling a fairly light horse trailer and the...


You should not use overdrive unless you are steadily going highway speeds. I had one of those and my ex liked to use cruise control on windy coastal roads. This caused it to shift back and forth from 3rd to overdrive constantly. So I disconnected the cruise control so he couldn't use it. Lol. I'm not suggesting this for you. You should keep overdrive off for now and have your transmission serviced. New filter & oil & flush the cooler. Make sure you ONLY USE THE RECOMMENDED FLUIDS!!!!!!!!!! See if that helps. Do not use overdrive pulling a trailer and going up a hill and do not use it if you are on windy roads where you are slowing down alot of times. Try letting off the gas for a second when you do want to engage the overdrive. Remember to always check your automatic tranny fluid with the engine running and fully warmed up.

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1999 jeep will shift first 2 gears but when it is time to go into overdrive the transmission jerks and it goes into limp mode and check engine light comes on 8 cylinder,automatic


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