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1998 Ford Expedition Question: overdrive off light

 

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markmack1, 4.6L V8, El Reno, OK, February 01, 2009, 10:50
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my overdrive light off on the gear shifter is flashing on and off. does anybody know why?

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  • Answer #1

    dandd February 01, 2009, 12:32
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     Master

    This means that you have a transmission system code. You will need to have a scan of your transmission and power train to see what code or codes have been set. I would do this sooner rather than later before your Ford starts to exhibit functional problems with the transmission if it has not already.

    Just becasue your transmission has codes does not mean it is totally gone. It is just that many shops aren't really equipped ( skillwise ) to deal with the repair of the individual components so they recommend the 'catch all' overhaul routine. I have repaired hundreds of transmissions by replacing 1 solenoid, a part of a valve body, an input or output speed sensor, a temp sensor ( yes transmissions have dedicated coolant and oil temp sensors ). I have done this at major dealerships and independent shops. I have replaced Honda solenoids when the dealer recommended a $5000 overhaul, that completely repaired the problem. Many Techs and shops don't ( can't) troubleshoot down to the component level, but it can be done.

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  • Answer #2

    zipperhead February 12, 2009, 07:24
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    hey bud. have same problem, went to the tranny shop got the codes, they told me the tranny is bad; hears the catch i think its fine, still it wont pass inspection so tranny must be rebuilt 1600.00. if you find a better way to fix please share answer, my lite on the shifter handle has been blinking for 2years and tranny is working fine. yet the code says its bad go figure!!! well good luck

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  • Medium-star Best Answer
    Visitor, March 08, 2010, 20:58

    My was doing the same just after changeing the trans when i did the trans swap I didn't change the siloinds and TTC siloind/torque converter switch on off its all one peice.Anyway so i dropped the pan put my old siloinds in then I reset the ecm by disconecting the battery for about 5 mins then reconected it and bam no more flashing light so this tells u its not always a bad transmission.Before spending thousands try dropping the transmission pan to check for metal shavings in the pan if there is nothing its a sensor on the outside of the trans or the siloinds on the valve body.Pull it yard is a good palce I payed 20.00 for the siloind board in the pan and 5.00 for the two sensors outside the trans speedo sensors.Hope this helps worked for me.Oh ya the ford dealers sell the siloinds new for about 80.00.

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  • Answer #4

    Visitor, April 22, 2010, 23:30

    I'm wondering if the speed control deactivation switch that they put in these vans due to the recall could be causing the overdrive to malfunction. I didn't have any trouble with my transmission until I went in to have this switch put in due to the recall. Now, I have the same problem. My overdrive turns off and the light begins blinking after I drive over 25 miles on the highway.

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