2025 Mustang GT coupe vibration at freeway speeds

[Mu2ken]

I purchased a brand new 2025 GT coupe with the performance package and 10 spd auto transmission. On my first long freeway trip I noticed it has a constant severe vibration at freeway speeds, noticeable starting around 60 mph and increasing with speed to be severe at about 85 mph. I drove it for about 2 hours at speed and it was truly obnoxious! The vibration is so intense that it creates a drone throughout the vehicle and the rear view mirror is literally buzzing, you can't even tell what's behind you as the image is so distorted from the vibration. If you gently place your fingernails against the mirror you'll feel an actual buzzing!
I took it to the dealer immediately, it had about 800 miles on it by the time I got it there and they said that there was an out of round tire, they replaced and said it was good to go. I drove it afterwards and no change whatsoever so I brought it back and they did road force balancing all around and once again said its good to go and once again, no change at all!
I brought it back and told them its unacceptable and that I don't want it back until the issue is resolved. On the last visit I drove a technician through all the speeds and he verified 100% that the vibration is present.
Its been at the dealer now for over a month, they also checked driveshaft balance to no avail. They appear to be working with Ford engineering but not able to come up with a fix, I've spoke to others having the same issue and feel that there is likely a lot of vehicles having the same issue with people not being picky about it and really looking into it?
The dealer ran a vibration analysis tool in the car and then said they did the same on another similarly equipped car from their lot and said the other car did even worse!
At this point I've come to the conclusion that there is something wrong with the vehicles from Ford and that a brand new $65k Mustang should be smooth at highway speeds and that if it can't be alleviated that Ford is going to be taking the car back as I refuse to accept a severe vibration as "just how they are"!
Also, when at speed with vibration occurring shifting into neutral results in no change to the vibration and droning sound, same goes with placing the exhaust into any of the 4 different sound modes, no change at all.
I've also in the limited time driving this car(it has about 1,200 miles on it) have seen some issues with the Electronic systems as well that I've seen others post about. Sometimes it takes forever for the screen to boot up, settings I've programmed just go away etc.

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[Dave2013M3]

A wheel weight could have fallen off and now you are out of balance. That would be my first guess.

 

[Mu2ken]

A wheel weight could have fallen off and now you are out of balance. That would be my first guess.

They just did a full road force balance on all 4 wheels!

 

[smurfslayer]

You didn’t notice this on the test drive?

 

[steveo1960]

I would request the dealer swap all 4 tires and rims from a car that does not vibrate, maybe one that's a used car and see what happens. Do you feel the vibration in your butt or steering wheel? What happens if you are in park and rev the motor, do you feel it then? Also if you touch the brake ever so lightly when the car is vibrating do the symptoms change? Any indications of a wheel overheating, hit it with an infrared thermometer tool. This would check for dragging caliper and stuff like that. Lastly, have them put it on a lift and have someone in the car "driving it", and look for anything that appears to be wobbling... Vibrations can be very difficult, and time consuming to diagnose which are 2 things dealers aren't fond of

 

[Mu2ken]

I would request the dealer swap all 4 tires and rims from a car that does not vibrate, maybe one that's a used car and see what happens. Do you feel the vibration in your butt or steering wheel? What happens if you are in park and rev the motor, do you feel it then? Also if you touch the brake ever so lightly when the car is vibrating do the symptoms change? Any indications of a wheel overheating, hit it with an infrared thermometer tool. This would check for dragging caliper and stuff like that. Lastly, have them put it on a lift and have someone in the car "driving it", and look for anything that appears to be wobbling... Vibrations can be very difficult, and time consuming to diagnose which are 2 things dealers aren't fond of

They don't have another with the Brembo's that doesn't vibrate lol! Its felt through the seat/chassis not so much through the steering wheel, feels very centralized and more to the rear. I don't believe braking helped at all but Im not positive on that. I've given input including driving it on a rear wheel rollers to separate the front end from the rear of the car but I don't think they have yet. Hard to get the dealer to do things and they never want you back in their shop area.

 

[LouG]

So the issue is with the gearbox back, putting it in neutral isolated the engine. It's process of elimination now. I assume the wheel are round and running true?
Have they checked tightness of all rotating parts from g/box back?

 

[steveo1960]

Sadly I've been one of those unfortunate folks who are blessed with either strange tire wear or vibrations with various cars over the years, both new and used so I know the drill and it's not pleasant at all. You can try another dealer or pay for an independent shop to look at it. Not a chain, but a local place that maybe the local muscle car groups can suggest. Also drive shaft out of balance is not unusual. You need to level set from ground zero, forget what has been already done, and start over with most likely suspect and then moving to the more esoteric possible causes. I suppose you can also lemon law it. Keep at it and follow the Occam's Razor principle......

 

[WhooptieDo]

I have the dealership investigating mine right now for a similar issue. It comes in around 70 and gets most prevalent around 78 mph. I'm confident it's a driveline vibe, but unsure if it's a u joint, carrier or otherwise. The dealership tech acknowledged it, but tested/measured all the tolerances and says it's within spec. I'm sure if this was my truck, I'd never feel it, but since it's a uni body it reverbs inside the cab.

Tommorow morning the tech and I are test driving another mustang on the lot to verify if it's felt in another vehicle. If not, he has something he can submit a claim against.

To the folks commenting about not seeing it on the test drive, I didn't hit 70mph on that one. Only 65 heh.

 

[Paul's stable]

I purchased a brand new 2025 GT coupe with the performance package and 10 spd auto transmission. On my first long freeway trip I noticed it has a constant severe vibration at freeway speeds, noticeable starting around 60 mph and increasing with speed to be severe at about 85 mph. I drove it for about 2 hours at speed and it was truly obnoxious! The vibration is so intense that it creates a drone throughout the vehicle and the rear view mirror is literally buzzing, you can't even tell what's behind you as the image is so distorted from the vibration. If you gently place your fingernails against the mirror you'll feel an actual buzzing!
I took it to the dealer immediately, it had about 800 miles on it by the time I got it there and they said that there was an out of round tire, they replaced and said it was good to go. I drove it afterwards and no change whatsoever so I brought it back and they did road force balancing all around and once again said its good to go and once again, no change at all!
I brought it back and told them its unacceptable and that I don't want it back until the issue is resolved. On the last visit I drove a technician through all the speeds and he verified 100% that the vibration is present.
Its been at the dealer now for over a month, they also checked driveshaft balance to no avail. They appear to be working with Ford engineering but not able to come up with a fix, I've spoke to others having the same issue and feel that there is likely a lot of vehicles having the same issue with people not being picky about it and really looking into it?
The dealer ran a vibration analysis tool in the car and then said they did the same on another similarly equipped car from their lot and said the other car did even worse!
At this point I've come to the conclusion that there is something wrong with the vehicles from Ford and that a brand new $65k Mustang should be smooth at highway speeds and that if it can't be alleviated that Ford is going to be taking the car back as I refuse to accept a severe vibration as "just how they are"!
Also, when at speed with vibration occurring shifting into neutral results in no change to the vibration and droning sound, same goes with placing the exhaust into any of the 4 different sound modes, no change at all.
I've also in the limited time driving this car(it has about 1,200 miles on it) have seen some issues with the Electronic systems as well that I've seen others post about. Sometimes it takes forever for the screen to boot up, settings I've programmed just go away etc.

Sorry to hear about your issues and hope they fix it. I have not experienced what you are talking about..

 

[Mu2ken]

You didn’t notice this on the test drive?

I did not, because of traffic etc there was no way to sustain high speeds for any amount of time and honestly, the last thing I would even consider is whether or not a brand new $65k Mustang GT with less than 400 miles on it(when I noticed the issue on the first long freeway trip) would have a massive driveline vibration! If I were testing a used car of course it would be different but you would only assume that Ford engineering wouldn't allow for such a obvious miss on engineering the car, they have entire NVH teams that are supposed to scrutinize all Ford products for excessive noise, vibration and harshness. I've owned about 35 cars over the years of which about 10 of them were brand new vehicles and have never felt such a vibration in the new vehicles nor the used ones many with over 100k miles on them! My last brand new Mustang GT was a 2005 and it had no vibration issues whatsoever. I currently have a 1997 Ford F150 with 130k miles and a 1997 Ford Thunderbird V8 with independent rear suspension with about 90k miles on it and both vehicles are absolutely smooth without vibration at any speeds...even my 220k mile Chevrolet Suburban is smooth as silk at freeway speeds.

 

[Mu2ken]

Sorry to hear about your issues and hope they fix it. I have not experienced what you are talking about..

Unfortunately I just recieved a voicemail from the dealer saying that engineering said that "this is just how the cars are and is acceptable to them, no further repairs or work on the vehicle required"!
Definitely not going to be the end of it however.

 

[AZ_Ryan]

I'm sorry this is happening to you. I can assure it is not normal or common on the S650

I do however remember someone else posting with the same exact problem recently. They even mentioned a vibrating rear view mirror. If I remember correctly it turned out to be an easy fix that completely resolved the issue. Something to do with one of the brakes or maybe drive line, I'm not sure. Do a search in the forum and sure you'll find it.

Regardless, it also sounds like you need to find a new dealer and start over. If they can't find the issue and says it's normal then that means they are inept and not up to the task. Good luck, and don't get too down on the car or Ford.

 

[Q6543]

Interesting, I’d love to go for a ride in it, to see the difference in OEM acceptance of NVH and a customer complaint from NVH.

 

[Mu2ken]

Thanks, I appreciate it! I di recall seeing some stuff on this forum but I don't recall there ever being a fix for it?

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