Hey everybody I am new to the forum and hope you all can help me out. I bought a new f150 last June. It only has 20,000 miles on it and I am experiencing a pretty noticeable vibration when my rpm's are at 1100 while the engine is in 6th gear and higher. I brought it to get a PCM service bulletin update but it hasn't done a thing. This just started happening around a month ago. Any help would be greatly appreciated.

Coach C

 

Old post, so it must not be a very common problem.
My '22, though, is doing something similar. It's a very slight thrumming, at certain rpm's, and almost not even felt.
It sounds a bit like bad tires, but it's not constant, and the tires are only 18k old, so it can't be that.
So far I am chalking it up to being totally normal, like maybe a "resonance" during a certain rpm range?

 

And none of you mentioned what's your motor? lol
for the slight trumming, if it's a 5.0, it could be cylinder deactivation? I felt it some times when coasting with very light throttle. it's normal, felt exactly the same as my old hemi in MDS mode.

 

Good point! My motor is the 2.7 EcoBoost...
Like I said it's very feint, I feel it through my feet, and it occurs only occasionally.
Often in the 1300 rpm range, and in the upper third of my ten gears.
I'm trying to ignore it, presuming it is an engine resonance, but was curious if others have noticed it.

 

Not saying this is it but, my 2016 2.7 (no replaced with a reman from Ford) had a slight vibration at cruise the would come and go. More noticeable when going up a slight incline where you need to add a little more gas to maintain speed. I believe it was around the same RPMs you describe. I can't remember since the last time I drove the truck with that engine was back in December of 2022. Turned out it had metal shavings in the oil and thus why it got replaced. I had this slight vibration for a good 6 months before it actually started making a clicking noise. Until then I could never figure out where it was coming from. Just food for thought and may not be what you are experiencing.

 

If I tow with my truck, try to go up a hill on an interstate at 1100-1300rpm, and accelerate, it’s not a happy engine.

Experience has taught me to use normal if on flat type road. But the hills and tow haul is the way to go.

 

Only 17k on the engine, and on it's second oil change.
But, I will try that anyway, because it's easy.

 

I test drove a few 2.7 Eco and bought one (23) and noticed the random vibration. May caulk it up to normal or out of balance tires? I have read some have come with poor balance. putting on winter tires in a week so will see.