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post #1 of 7 (permalink) Old 07-01-12, 02:54 PM Thread Starter
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2002 F250 Lost overdrive and reverse

My 2002 F250 acted up a bit last night. The overdrive light started flashing. It seemed shift OK through the gears, except for the fact that it would not shift into overdrive. Later I discovered that it also would not go into reverse. Any thoughts on what the problem might be? Mechanical or electronic?

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post #2 of 7 (permalink) Old 07-01-12, 04:20 PM
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Re: 2002 F250 Lost overdrive and reverse

sounds mechanical to me, have you ever had the tranny serviced? Might be as simple as changing the fluid and filter, but if you wait too long, it might cost you a rebuild.
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post #3 of 7 (permalink) Old 07-01-12, 04:38 PM
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Re: 2002 F250 Lost overdrive and reverse

Take it you have checked the ATF level ?
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post #4 of 7 (permalink) Old 07-01-12, 09:31 PM
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Re: 2002 F250 Lost overdrive and reverse

Think maybe it's a good idea to read the codes rather than guess?
This gives an idea what has gone faulty.
To loose OD and reverse suggest a servo function common to both has an issue or even an electrical fault.
Get the codes read with a 'scanner' not a reader.
Good luck.
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post #5 of 7 (permalink) Old 07-02-12, 09:21 AM Thread Starter
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Re: 2002 F250 Lost overdrive and reverse

Thanks to all for the advice. The fluid level is good, but the fluid appears to be a little dark in color.
I am going to have the codes checked and see where to go from there. Regardless of any othere problems that are found, it probably won't hurt to have the fluid flushed out and replaced and the filter changed.
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post #6 of 7 (permalink) Old 07-02-12, 06:39 PM Thread Starter
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Re: 2002 F250 Lost overdrive and reverse

The code is P0783, the 3-4 shift selenoid. Does anyone know where this is located on the transmission?
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post #7 of 7 (permalink) Old 07-02-12, 09:45 PM
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Re: 2002 F250 Lost overdrive and reverse

Solenoids are all located on the transmission 'valve' body'.
Access is by removing the pan.
It could be the outside connector, the inside cable or the solenoid.
Good luck.
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