Chuck_A-19
Member
nope, I did a tuneup and had a Transmission flushed and the air control valve replaced...... Just got back from another trip yesterday and shuttered the entire time.....
2015 Expedition EL - Shutter/vibrate at 45-80 mph during acceleration
- Thread starter Chuck_A-19
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hapEcat
Member
Chuck_A-19
I've been having the same thing that you have described. Local service department swore it was plugs. Plugs replaced @ ~40Kmi, condition still exists, and is progressively getting worse, since towing a trailer. The more you tow, the worse it gets. It's been going on since 28Kmi, and now has 73Kmi... Very annoying!It is of my opinion that it is either the torque converter lock/unlock, or perhaps a shift module that cannot make up it's mind as to which gear it wants to be in. When these shutters happen, there is always an rpm fluctuation/increase, associated with the shutter, and also I can reproduce this shutter it at will. Ford turns a blind eye, to this problem, because no codes are thrown.
Folks, it ain't plugs, tire imbalance, crooked wiper blades, or barking dogs, it's a "transmission/transfer case/differential" running gear issue... But getting Ford to address it, is exhausting!
Last edited:
OrlandoExpyOwner
Member
Chuck,
It has been about a year since your last post. Any luck in finding a solution?
I have a 2016 Limited 4x2 that is exhibiting the exact same symptoms. At highway speeds, on a smooth road, when I slightly accelerate, the Expedition vibrates/rumbles like you are driving over rumble strips. The vibration is momentary. If I let off of the accelerator, it stops. It doesn’t appear to happen when I accelerate more aggressively, thus dropping from 6th gear to 5th or lower gear.
The Expedition has 103k miles, and never tows. It is the family car. We have six kids. I literally just finished replacing all the plugs and coils (and air filter). The plugs had about 30k miles on them and looked fine, from what I could tell. The coils were original.
I took it on a test drive and as soon as I settled into a steady highway speed, I was able to reproduce the rumble again. Same thing, smooth road, slight acceleration and it felt like momentarily driving over a rumble strip.
I am at a loss. Any help would be greatly appreciated.
Thanks!
@hapEcat
Since it’s been a month since you posted, did you find anything out about your expedition?
Aaron Buchanan
Active Member
I had 2015 expedition limited 4x4 took me forever and many times back and forth to dealer to figure it out! Dumped tranny fluid and put in new filter. The transpan and gasket are reusable on this model so that fixed my issue. Never had another issue but I traded for 2019 fx4 this month!
Aaron Buchanan
Active Member
I used all motorcraft fluid and filter for the job. Mine had 75k on the dash when it started doing it! Fluid was black when dumped!
That fixed your vibrational issues?
Aaron Buchanan
Active Member
Yes it did fix the issue!
Aaron Buchanan
Active Member
It was weird too cause it would always happen right at 45 mph.
Wow, thanks man, I’m going to have to try that. Sounds like the same problem as mine. I’m going to check for misfires first just to make sure but hopefully between the two it gets resolved
Aaron Buchanan
Active Member
Yes spark plugs! Then do tranny! If you get a chance clean all your sensors on intake tract .there are 3 they get oil covered! 1 on intake 1 on throttle body pipe and the last one usually stays clean as it by the air intake box .
OrlandoExpyOwner
Member
Hey thanks for the reminder. I've been meaning to follow up on my post.
So following up on the information in my post above. When I got back from the test drive after changing out the plugs and coils, i kept investigating the shudder issue. In my investigations, I kept reading about people adding Shudder Fixx to the transmission fluid and how it almost immediately fixed the shudder. I was skeptical, but I did some quick research, read some reviews and checked out the product website. For $10, I decided to give it a try. Much cheaper and much easier than any of the other possible solutions. As a side note, I did decide to also add the Lubegard ATF Protectant as well (see link below). Again, I was thinking, it's worth a shot.
Two Lubegards Are Better Than One - Lubegard
Two Lubegards Are Better Than One Lubegard Synthetic ATF Protectant and Instant Shudder Fixx work better, faster and longer together to stop torque-converter clutch shudder (TCC shudder). Both products are effective on… Read More
www.lubegard.com
After a quick drive up to the local O'Reilly's, I removed about 7-8 oz of transmission fluid and added the 2 ounces of Shudder Fixx and half a bottle (5 oz) of ATF Protectant. I then took the Expedition for another test drive. I literally live 2.5 miles from the interstate. I figured there was no way that it would make a difference that quickly. Once I got up to a steady interstate speed, I tried unsuccessfully to replicate the shudder. Prior to adding the additives, I could easily replicate the shudder on demand, every time. Honestly, I was shocked that not only did it work, but it worked that quickly.
It has been a little over 1000 miles since and the shudder is completely gone. Based on some continued research, it appears it was a torque converter shudder. I am not a car guy and do not claim to be one. But it appears the additives decreased the friction and thus reduced/eliminated the torque converter shudder. What I don't know is if this is a temporary fix for a bigger problem. Maybe I've just kicked the bottle down the road for a little while. But for now, I'm satisfied. On to the next project.
Hopefully this helps and Happy New Year!
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