Vibration at take off

buster

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ed
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new guy here, sorry if this is posted elsewhere, I didn't spend a lot of time looking.

Bought my Lariat FX4 back in mid-January. Still crazy about the looks, and many other cool things but...Mine had a serious shimmy when applying the brakes. I caught it during test drive, and new it would be resolved so I bought it. Service department said it was because they were self adjusting, and had not seated yet lol..I knew better, and a few days later they trued the rotors and got 80% of the shimmy out.

The REAL problem is at take off. Between 1600 - 1800 rpm there is a vibration that drives me nuts. I know the engine is probably thrashing about under the hood because it sounds like an old VW bug. That's how a passenger described it lol. Well the service department couldn't feel it, but I think looking for the problem wrong. But, it vibrates enough that when you are in that rpm window you can hear the back seat backrest (that still wont latch after they "fixed" it) vibrating against the latch point. You can also hear the backrest vibrate when braking, hence the brake shimmy not entirely fixed.

Years ago I would have thought the drive shaft not balanced, or transmission mount bad, it is that sort of vibration. I also know how a motor can shake when timing is off, maybe ignition timing?

I keep hoping others are experiencing this but have not seen any yet, I want it fixed, and want to love my new truck!

Anyone else have ill fitting upholstery? Mine seats are wrinkly. Driver's side is bubbling up at the seat bottom. But, I am a little biased here, I work at a plant that manufactures seats for automotive. My seats would have never left our building.

So thanks for any direction!
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ulev1st

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I have the takeoff vibration.. I just figured it was a quirk in the transmission. my pass side seat bottom has a wrinkle in it too..
 

JDCinVA

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Lrtexasman

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I have a 2017 Fusion with Eco 2.0 i have 60k miles and it’s always had the vibration at takeoff. I was told it’s the wastegate by the service dept and nothing wrong. Maybe you can google ecoboost wastegate and see if that’s your issue.
 

pannwfn

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Even with 45psi haven't noticed a thing. 31psi drives great, the only time I've had shimmy not this truck was do to out of balance wheels and tires and front end alignment.
 

Julie dominesey

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The seat latch thing is just readjust mechanism with your finger .. as to the shimmy .. that’s a problem .. mine don’t shimmy tires set at 40 psi .. I take off hard sometimes .. no shimmy .. yes that engine roars at take off it’s kinda weird .. .
 

HighFivenWhiteGuy

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I had that vibration when the transmission is under load and the engine is at low rpm, sort of like the transmission is trying to downshift but cant. Usually occurred when starting up a hill at low speeds, like in a neighborhood or something when I am super soft on the throttle. I now know that when I come to a hill at low speed I need to give it a little extra or tap the gas to get the transmission into a lower gear.

I used to have a similar thing happen when accelerating around 90 degree corners such as a right turn at a stop light but that has gone away. Apparently the computer "learns" the driver's habits and adjusts the engine and transmission accordingly. Plus now that I am at about 900 miles things seem to be bedding-in and mellowing out.
 

pannwfn

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new guy here, sorry if this is posted elsewhere, I didn't spend a lot of time looking.

Bought my Lariat FX4 back in mid-January. Still crazy about the looks, and many other cool things but...Mine had a serious shimmy when applying the brakes. I caught it during test drive, and new it would be resolved so I bought it. Service department said it was because they were self adjusting, and had not seated yet lol..I knew better, and a few days later they trued the rotors and got 80% of the shimmy out.

The REAL problem is at take off. Between 1600 - 1800 rpm there is a vibration that drives me nuts. I know the engine is probably thrashing about under the hood because it sounds like an old VW bug. That's how a passenger described it lol. Well the service department couldn't feel it, but I think looking for the problem wrong. But, it vibrates enough that when you are in that rpm window you can hear the back seat backrest (that still wont latch after they "fixed" it) vibrating against the latch point. You can also hear the backrest vibrate when braking, hence the brake shimmy not entirely fixed.

Years ago I would have thought the drive shaft not balanced, or transmission mount bad, it is that sort of vibration. I also know how a motor can shake when timing is off, maybe ignition timing?

I keep hoping others are experiencing this but have not seen any yet, I want it fixed, and want to love my new truck!

Anyone else have ill fitting upholstery? Mine seats are wrinkly. Driver's side is bubbling up at the seat bottom. But, I am a little biased here, I work at a plant that manufactures seats for automotive. My seats would have never left our building.

So thanks for any direction!
I have I believe duplicated your problem but the only way I could do it was to not turn off start stop.
 

HighFivenWhiteGuy

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I am at 1200 miles now and have aired down the tires to 30 all around. Also using 92 gas. All those things combined seem to have cut the vibration down to about 25% of what it used to be but it is definitely still there. SuperCrew Lariat FX4 here as well. The transmission just feels like it can't make up it's mind what it wants to do and still slogs down in too high of a gear when going up hills. Now I know to just double tap the gas up hills to get a lower gear. I had the same problem with my Subaru, that little 4 banger did NOT like low RPMs going up hills.
 

MT19RANGER

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thx! I will try this. its very annoying
Yes, I think it's the start/stop shutter when it re-starts. I felt a little shutter when removing my foot from the brake and then pressing on the gas. Notice the RPM was zero and then increased when wanting to take off.
 

Marshal.

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I've noted it on take off. Start stop is always disabled, so I know it's not that
 

MT19RANGER

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I've noted it on take off. Start stop is always disabled, so I know it's not that
Hmm, I haven't noticed it on mine at all.
 

Crismac

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I'm with MT19, the only time I have had a vibration at takeoff is when the auto stop starts and at night the lights flicker a little. Never had it at any other time.
 

Beef_Stew

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I had that vibration when the transmission is under load and the engine is at low rpm, sort of like the transmission is trying to downshift but cant. Usually occurred when starting up a hill at low speeds, like in a neighborhood or something when I am super soft on the throttle. I now know that when I come to a hill at low speed I need to give it a little extra or tap the gas to get the transmission into a lower gear.

I used to have a similar thing happen when accelerating around 90 degree corners such as a right turn at a stop light but that has gone away. Apparently the computer "learns" the driver's habits and adjusts the engine and transmission accordingly. Plus now that I am at about 900 miles things seem to be bedding-in and mellowing out.
I've noticed the same issue about the vibration from the trans under load in low rpms
 
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