transmission o/d light flashing

[ratskyl]

I own a 99 f150 supercab 4X4 my o/d light is blinking on my shifter i plugged it in on my otc 4000 scan tool and i have a code # P0781 1 to 2 Shift Error. does any one no what causes this and how to fix the problem

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[dirtyd0g]

It's hard to say what the problem is without taking the trans apart. It could be lots of things.
Alan

[Coal.Miner]

mine did that today.....03 heritage..scared crap out of me at first but then i calmed down and thought about it.....grabed the shifter and push it up a bit and it clicked...shut my truck off...started it back and viola light had quit flashing.....I would say that you may be in between gears as i was.....hope thats all it is anyway

[angela]

My daughters 1999 F150 ext. cab did this, after the Ford place had it 3 times and several hundreds of dollors for various things and the od light would still come on and shifting was beginning to hang , they wanted to replace all the seals (estimate of 800 dollars including labor), we took it to a transmission man, he changed out the servo and a pinch seal and it has been great. (total of $125)