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Transmission shudder

Polo08816

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UPDATE!
I decided to run an experiment.

I have been running regular 87 octane (with up to 10% ethanol) gasoline since new thinking the additional octane of premium was not necessary as I don't tow anything and I could live without the extra 10-20 HP.

Just for the heck of it, I thought I would try using 91 octane premium (with up to 10% ethanol) to see what, if any, difference there was. After 5000 miles of using only 91 premium I can say that my shudder issue has been resolved. I have not experienced the shudder for 4 months and the truck runs smoothly under all conditions. Additionally, my gas mileage has increased from an average of 17.4 to an average of 18.3 (according to the "lie-o-meter") with no change in driving habits.

I have concluded that my shudder issue is very likely a misfire occurring under certain load and RPM conditions using lower 87 octane fuel. Yes, it costs me 10% more for fuel but I am getting part of that expense back in the form of better gas mileage. I am really pleased with the improved drivability and smoothness of my truck now. Maybe it is the combination of the installation of TSB 22-2224 and the premium fuel, but the TSB alone certainly did not do the trick. Too bad Ford couldn't have shared this info with me a couple of years ago...
If it is indeed a fuel specification/requirement, then I don't think the fix is going to be easy because it may have an impact on the actual fuel economy rating of the vehicle.
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gavinlt

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Hi curious if anyone has any updates on this issue? I know there have been a lot of slightly different problems and solutions thrown around on this thread but I am having the slight shudder at highway speeds when doing moderate acceleration. Primarily in 8th gear but happens some in 9/10 as well.

It's a 2021 with the 2.7 and 10 speed with 47k miles. I just bought the truck used yesterday and noticed it within a couple of hours of picking it up.... Guess I didn't do a long enough/extensive enough test drive. :facepalm:

What are yall's updated mileages with the problem persisting but no major repairs/replacements needed? Obviously a fix would be ideal but is this something I can continue to drive long term and feel somewhat assured that although annoying I'm not going to get stranded at some point? Trying to decide if I need to pursue attempting to reason with the guy that sold me this truck on a refund or something....

Also joined this forum just to post on this thread as some others have.
 

Ricksc

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Try running sport mode for a couple weeks. This made mine shift smoother in regular mode. It does have to learn your driving habits. As far as gas mine seems to run better on 97.
 
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Bullett

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I’m at 38k miles now. My truck still shudders, but running premium fuel has helped a lot. Sucks big time having to pay for premium fuel, but I enjoy the truck much more when it doesn’t shudder.
 

dbtgt

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I’m at 38k miles now. My truck still shudders, but running premium fuel has helped a lot. Sucks big time having to pay for premium fuel, but I enjoy the truck much more when it doesn’t shudder.
^^^This
Mine still shudders after 48,500 miles, but has been better and more tolerable since I started using premium (91) fuel. No mechanical problems yet...
 

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gavinlt

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Good to know... Thanks all for the replies!
 

gavinlt

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Hi curious if anyone has any updates on this issue? I know there have been a lot of slightly different problems and solutions thrown around on this thread but I am having the slight shudder at highway speeds when doing moderate acceleration. Primarily in 8th gear but happens some in 9/10 as well.

It's a 2021 with the 2.7 and 10 speed with 47k miles. I just bought the truck used yesterday and noticed it within a couple of hours of picking it up.... Guess I didn't do a long enough/extensive enough test drive. :facepalm:

What are yall's updated mileages with the problem persisting but no major repairs/replacements needed? Obviously a fix would be ideal but is this something I can continue to drive long term and feel somewhat assured that although annoying I'm not going to get stranded at some point? Trying to decide if I need to pursue attempting to reason with the guy that sold me this truck on a refund or something....

Also joined this forum just to post on this thread as some others have.
Ok minor update on mine for others who stumble across this thread in the future like I did... I took it to my local Ford dealer today and they did the PCM update. The shudder is still there but it's definitely better. The shift points in the transmission seem much better so it shudders less often and not quite as noticeable (although still there). Since this truck is still only 2 days old to me at this point I'm going to drive it for a bit and hope the transmission gets "used" to my driving style. I'm hoping the PCM update today reset things too so it's starting the "learning" from scratch rather than keeping all of its prior learning from the previous owner. I am also planning to try premium fuel to see if that helps. Thanks again for the replies!
 

blazef150

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I just recently put an aftermarket exhaust on my F150. The shudder is more noticeable with the exhaust now and never happens in sport mode. Mine is a 5.0l and I have been running 93 octane. My observations in normal mode are that Ford is lugging the engine too much, especially when it goes to V4 mode at least in the 5.0l. It only happens around 1000 rpm. I can hear it go in V4 up shifts and goes to 1000rpm and shudders. A little throttle and the shutter goes away but reduce throttle and goes back to v4 low rpm and shudders again. V4 in higher rpms 1200 and up is not a problem.

The 2021 2.3l ford ranger at my workplace does lugging shudder too.
 

Snakebitten

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Ok minor update on mine for others who stumble across this thread in the future like I did... I took it to my local Ford dealer today and they did the PCM update. The shudder is still there but it's definitely better. The shift points in the transmission seem much better so it shudders less often and not quite as noticeable (although still there). Since this truck is still only 2 days old to me at this point I'm going to drive it for a bit and hope the transmission gets "used" to my driving style. I'm hoping the PCM update today reset things too so it's starting the "learning" from scratch rather than keeping all of its prior learning from the previous owner. I am also planning to try premium fuel to see if that helps. Thanks again for the replies!
Just a suggestion. Other's have enjoyed the results.
After having the Adaptive Transmission tables cleared, drive the truck in Sport mode for a couple of hundred miles. Or at least a few key/cycles and daily commutes.

Not suggesting driving the truck any more aggressively than you normally do, but rather using the transmission shifting strategy of "Sport" mode to be the mode you are in to repopulate the tables.
 

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blazef150

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Just a suggestion. Other's have enjoyed the results.
After having the Adaptive Transmission tables cleared, drive the truck in Sport mode for a couple of hundred miles. Or at least a few key/cycles and daily commutes.

Not suggesting driving the truck any more aggressively than you normally do, but rather using the transmission shifting strategy of "Sport" mode to be the mode you are in to repopulate the tables.
Did you do any of the ford adapt procedure when you did this or just went straight for the sport mode driving?
 

Snakebitten

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Did you do any of the ford adapt procedure when you did this or just went straight for the sport mode driving?
Are the Ford "Adaptive Procedures" the one provided in the factory service manual?
I think I've read it before. It's certainly something that allows the technician to "condense" the time it takes to repopulate the cleared tables. But what I don't know is if it is a superior method for doing so.

I've had several 10r80 equipped trucks. And several more in the family fleet, as well as friends.
There certainly is a range of variation between them collectively. In my opinion, even if you don't have a faulty component, like an injured CDF drum, they are so heavily software defined that sometimes you can get one that nothing short of "tuning" it will tame the beast.
 

blazef150

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Are the Ford "Adaptive Procedures" the one provided in the factory service manual?
I think I've read it before. It's certainly something that allows the technician to "condense" the time it takes to repopulate the cleared tables. But what I don't know is if it is a superior method for doing so.

I've had several 10r80 equipped trucks. And several more in the family fleet, as well as friends.
There certainly is a range of variation between them collectively. In my opinion, even if you don't have a faulty component, like an injured CDF drum, they are so heavily software defined that sometimes you can get one that nothing short of "tuning" it will tame the beast.
Yep that's the one. Some of I think is Ford going with the lowest bidder 3rd party programmer. But also a bad learning adapt from the begin. Certain techs don't give a crap unfortunately.
 

gavinlt

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Just a suggestion. Other's have enjoyed the results.
After having the Adaptive Transmission tables cleared, drive the truck in Sport mode for a couple of hundred miles. Or at least a few key/cycles and daily commutes.

Not suggesting driving the truck any more aggressively than you normally do, but rather using the transmission shifting strategy of "Sport" mode to be the mode you are in to repopulate the tables.
Will do for sure... thanks for the suggestion!
 
 







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