07 with 55k suddenly loses OD and bad 1-2 shifts - Ford Powerstroke Diesel Forum
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Old 06-08-2010, 05:34 AM
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07 with 55k suddenly loses OD and bad 1-2 shifts

I know that the 5sp trans locks up OD when it "feels" like it goes into 2nd gear.. our 07 F550 we just got lasted less than a week before it started with not going into drive or reverse very fast.. LONG 4-5 second delays.

Then sometimes the 1-2 upshift is so bad, it feels like it isnt in gear or is in 4th gear suddenly then the engine defuels no matter how much your foot is on the gas.. and it then finally downshifts and is in 2nd gear.

Now the engine light is coming on sometimes and tow/haul blinks constantly and has NO overdrive suddenly until you turn it off and back on. Anyone know which solenoid has to do with the Tq converter lockup like this? id order one so i can replace it if thats the best course of action.
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Old 06-17-2010, 12:53 PM
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no one knows?

Why wont my hp tuners vcm scanner for the laptop or the SCT x3 tell me any engine codes? its throwing a light now and even when the engine light is on, it says no DTCs found? What scanner are you guys using for 05-08 ford f350s?
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Old 07-04-2010, 11:11 AM
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just made another post about the fix for this... $1600 later after the trans shop and its still doing the same thing
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