Acceleration shudder over 80

[shaldaya]

Everything seems mostly fine, but when i floor it, i feel a very slight shudder around and above 80 mph

All I've done so far is change the air filter, and I'm thinking to try the fuel filter next

Can anyone suggest possible causes?

 

[SHOdded]

model year, mileage?

if felt in the cabin area under the seats, it could be driveshaft

if at cruise and shudder is experienced it could be torque converter.

what is the transmission fluid maintenance history?

 

[bpd1151]

I had the same experiences with my SHO, prior to its latest engine demise.

Never did get a chance to pin it down, or diagnose it accurately.

From reading a few others, I suspected driveshaft myself. Thus why I ordered a brand new driveshaft in advance of my SHO's return.

Will be interested to see what others come up with as far as suggestions.

Sent from my SM-N986U1 using Tapatalk

 

[Lurch.sho]

I'm currently having a similar issue, not enough vibration to cause any problems but enough to not ignore it either. For me when I notice it, it has less to do with how fast I'm going and more with how high my engines revving. Would love to learn what this is about, might take it to the dealer to see as well since I still have my warranty, if I do ill post what they say here.

 

[shaldaya]

It Would definitely be highly appreciated if you did post whatever the dealership says

 

[Bluezone]

Everything seems mostly fine, but when i floor it, i feel a very slight shudder around and above 80 mph

All I've done so far is change the air filter, and I'm thinking to try the fuel filter next

Can anyone suggest possible causes?

Might be a good idea to have the intermediate shaft support bearing checked out. I had a shutter above 70 and it turned out the bearing was going bad. This is the shaft that comes out of the PTU to the right hand CV axle.

 

[Kingsped]

I'm currently having a similar issue, not enough vibration to cause any problems but enough to not ignore it either. For me when I notice it, it has less to do with how fast I'm going and more with how high my engines revving. Would love to learn what this is about, might take it to the dealer to see as well since I still have my warranty, if I do ill post what they say here.

I'm experiencing the same exact thing you are describing with my 2013 Flex Ecoboost..

 

[shaldaya]

I tried oxygen sensors and it's better, but still there

 

[shaldaya]

FOUND THE ISSUE
it was a vacuum line that came off, i assume it checked for balance between the two turbo
The line is one of the 3 in the photo on the top left of the engine