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Re: Ford f250 E40D reliablility??
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Posted by Bob on June 07, 2007 at 10:16:54 from (69.178.229.154):
In Reply to: Re: Ford f250 E40D reliablility?? posted by jdemaris on June 07, 2007 at 10:00:40:
Don't waste your money on the generic "$25.00" manuals, only expect them to be a "supplement" to the real thing. I have those, and they're about WORTHLESS compared to the genuine Ford manual, a BIG loose-leaf binder. I got mine off of ebay. They come up there quite often. The manual has a chart as to which solenoids are "commanded" by the 'puter for each gear. The scan tool will show you which solenoids are being "commanded" at any given time, and which "gear" that should give you. I've "been there, done that", and it's kind of overwhelming at first, until you begin see the rhyme and reason of the solonoids interact to produce the various shifts. The solenoids do NOT valve the shift oil directly. There is still a valve body, and shift valves. The solenoids valve a small amount of oil to operate the actual shift valves, basically electronic control of what the governor and vacuum modulator used to do. That's why the solenoids can "stick" so easily... they're small and have tiny passages, 'cause they don't need to move much oil. I really suspect one of the solenoids could be sticking, possibly from old metal debris, or as has been posted, if there's a thrust washer problem, causing ferrous material to be "shed" into the oil. The solenoids, being operated by a magnetic coil, attract any and all ferrous debris.
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