Auto Transmission Shifting Issues
#242
04-13-2011, 07:58 AM
I was pulling a 9700lb flatbed with a 13000lb tractor loaded. After a few hundred miles through East Texas (some pretty good hills) I experienced hard downshifting; seemingly affected by intermittent de-fueling. Boost would drop to 0, then return to 30+ within a few miliseconds (during downshift). Then after stopping for a traffic light; during hard acceleration accross busy intersection truck just sputtered and died. After restart, experienced the same symptoms twice more during the trip. CEL tripped. Code showed lack of communication between controller (computer) and fuel injectors. Dealer found chafed wire and rewrapped wire. Problem solved so far. Just that now I have a fear of this problem cropping up again. No confidence. Perhaps I should try and get the new flash done when available? Thanks for all the input on this issue.
#243
04-13-2011, 09:14 AM
#244
04-13-2011, 10:15 AM
I had just got off the Interstate and took a break while traveling just before it did it. So hot temps and then rest then start up and pull away= missed shift? Only happened once like I said in 11K miles.
#245
04-13-2011, 10:28 AM
#246
04-13-2011, 11:06 AM
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I was able to confirm that short of any last minute changes, KTP will receive the revised production calibration on 4/15, then a TSB (currently being drafted) along with the IDS service calibration on or about 4/20. Note that this update was provided to me just this morning.
-Paul
-Paul
Fantastic - thanks again! I'm looking forward to it!
#247
04-13-2011, 11:59 AM
I was able to confirm that short of any last minute changes, KTP will receive the revised production calibration on 4/15, then a TSB (currently being drafted) along with the IDS service calibration on or about 4/20. Note that this update was provided to me just this morning.
-Paul
-Paul
#248
04-13-2011, 12:28 PM
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A few months ago I pulled the power on the truck to "reset" the adaptive shifting tables.
It was explained to me that what I did was meaningless, and the explanation (kinda) made sense.
However, my truck is now shifting really rough, in almost every gear. I wonder if the shift pressures got programmed in there when the weather was cold and now that it is warm out the pressures are not valid. You would need more pressure to shift cold fluid right? More pressure equals harder shifts, right?
In my experiment, after I reset the computer, the truck drove very well. (It was driving a lot better even before the experiment. As time goes by the shifting is just getting worse, which really concerns me.)
I never had a problem with 4-5 until 2 or 3 weeks ago. It shifts okay sometimes but other times it is brutal. 1-2, 2-3 and 3-4 have been rough for a long time. I even experienced a brutal 5-6 on a very very slow accelleration where I was at 41-42MPH for a very long time and then I crested a hill which probably dropped the load enough to command a shift. It felt like it just dumped the clutch like a nervous student driver stuck on an uphill intersection.
Even though it might not make sense, I'm pulling the power tomorrow. The truck is nearly undriveable right now. I am not expecting a silky smooth transmission. My wife has one of those in her 2011 V6 Escape. But I do not expect to cringe at every shift.
On the highway, in manual mode, locked in 6th, all is well. Too bad I cannot do all my driving like that.
FWIW, I have only experienced 1 shift "flare" in the 9,000 miles I have had the truck. That "flare" scared me pretty good, though.
I'd give my left ******** for a first gear lockout.
It was explained to me that what I did was meaningless, and the explanation (kinda) made sense.
However, my truck is now shifting really rough, in almost every gear. I wonder if the shift pressures got programmed in there when the weather was cold and now that it is warm out the pressures are not valid. You would need more pressure to shift cold fluid right? More pressure equals harder shifts, right?
In my experiment, after I reset the computer, the truck drove very well. (It was driving a lot better even before the experiment. As time goes by the shifting is just getting worse, which really concerns me.)
I never had a problem with 4-5 until 2 or 3 weeks ago. It shifts okay sometimes but other times it is brutal. 1-2, 2-3 and 3-4 have been rough for a long time. I even experienced a brutal 5-6 on a very very slow accelleration where I was at 41-42MPH for a very long time and then I crested a hill which probably dropped the load enough to command a shift. It felt like it just dumped the clutch like a nervous student driver stuck on an uphill intersection.
Even though it might not make sense, I'm pulling the power tomorrow. The truck is nearly undriveable right now. I am not expecting a silky smooth transmission. My wife has one of those in her 2011 V6 Escape. But I do not expect to cringe at every shift.
On the highway, in manual mode, locked in 6th, all is well. Too bad I cannot do all my driving like that.
FWIW, I have only experienced 1 shift "flare" in the 9,000 miles I have had the truck. That "flare" scared me pretty good, though.
I'd give my left ******** for a first gear lockout.
FWIW, you can keep the family jewel.
#251
04-14-2011, 09:14 AM
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Pulling the power did not help.
What really confuses me is why the transmission used to shift so much better before? It was never perfect, like I have always had the 1-2 and 2-3 harshness and the vague floaty I-have-no-idea-if-I-should-shift-or-not, but I never had harshness with 3-4 or 4-5.
So why has it changed?
Something else I have noticed is before shifting accellerated in a linear manner, and "getting on it" made it shift better. Now, when it (abruptly) goes to a new gear it surges forward. I think it revs out in "neutral" between each shift now. (Not the crazy overrev, just a small one.)
Once this is fixed I will be happy. I expected a few issues with a first year model. I "bought in" because this is a completely Ford powertrain and because Ford did not take any government funds. While I do have a few other minor annoyances, I can easily live with them.
I sure hope the new TSB works!
PS - First gear lockout: Compromise and lock out 1st in normal mode and unlock it in Tow/Haul mode. I'll still give up a body part.
What really confuses me is why the transmission used to shift so much better before? It was never perfect, like I have always had the 1-2 and 2-3 harshness and the vague floaty I-have-no-idea-if-I-should-shift-or-not, but I never had harshness with 3-4 or 4-5.
So why has it changed?
Something else I have noticed is before shifting accellerated in a linear manner, and "getting on it" made it shift better. Now, when it (abruptly) goes to a new gear it surges forward. I think it revs out in "neutral" between each shift now. (Not the crazy overrev, just a small one.)
Once this is fixed I will be happy. I expected a few issues with a first year model. I "bought in" because this is a completely Ford powertrain and because Ford did not take any government funds. While I do have a few other minor annoyances, I can easily live with them.
I sure hope the new TSB works!
PS - First gear lockout: Compromise and lock out 1st in normal mode and unlock it in Tow/Haul mode. I'll still give up a body part.
#253
04-14-2011, 12:28 PM
Pulling the power did not help.
What really confuses me is why the transmission used to shift so much better before? It was never perfect, like I have always had the 1-2 and 2-3 harshness and the vague floaty I-have-no-idea-if-I-should-shift-or-not, but I never had harshness with 3-4 or 4-5.
So why has it changed?
Something else I have noticed is before shifting accellerated in a linear manner, and "getting on it" made it shift better. Now, when it (abruptly) goes to a new gear it surges forward. I think it revs out in "neutral" between each shift now. (Not the crazy overrev, just a small one.)
Once this is fixed I will be happy. I expected a few issues with a first year model. I "bought in" because this is a completely Ford powertrain and because Ford did not take any government funds. While I do have a few other minor annoyances, I can easily live with them.
I sure hope the new TSB works!
PS - First gear lockout: Compromise and lock out 1st in normal mode and unlock it in Tow/Haul mode. I'll still give up a body part.
What really confuses me is why the transmission used to shift so much better before? It was never perfect, like I have always had the 1-2 and 2-3 harshness and the vague floaty I-have-no-idea-if-I-should-shift-or-not, but I never had harshness with 3-4 or 4-5.
So why has it changed?
Something else I have noticed is before shifting accellerated in a linear manner, and "getting on it" made it shift better. Now, when it (abruptly) goes to a new gear it surges forward. I think it revs out in "neutral" between each shift now. (Not the crazy overrev, just a small one.)
Once this is fixed I will be happy. I expected a few issues with a first year model. I "bought in" because this is a completely Ford powertrain and because Ford did not take any government funds. While I do have a few other minor annoyances, I can easily live with them.
I sure hope the new TSB works!
PS - First gear lockout: Compromise and lock out 1st in normal mode and unlock it in Tow/Haul mode. I'll still give up a body part.
I also started out with no noticeable shifting issues and now I am seeing a temperature related low gear shifting smoothness problem and a constant 4/5 hard shift regardless of temperature.
#254
04-14-2011, 12:32 PM
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#255
04-14-2011, 12:36 PM
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