flutter @ 25-30mph

[arcman]

UAD,

Try again. Yesterday I received a message that had just the letter J.

 

[UseAsDirected]

UAD,

Try again. Yesterday I received a message that had just the letter J.

Arcman, please tell me where you got the hoses, what is their rating, and their part number. Thank you

 

[TinsleyC]

If you all with "flutter" haven't seen this thread, you need to. I think arcman nailed it.

Say Goodbye to the Flat Spotted Tires / Shuttering Theory

Finally got around to getting the car up in the air to do some investigating. With three items on the list, this turned into a two-dayer. Rotate tires, craft a drain line so I don't have to lift the car to change oil (yeah, I did just buy a vacuum pump but it will be quicker this way). The...

genesisowners.com

 

[thewiser2005]

Hi,
I had a flutter noise on my Genesis 2016 3.8 sedan RWD when I drive between 30~35M especially in the morning.
Took it to the dealer and they replaced the driveshaft part# 49100-B1100 and the noise went away.

 

[timbcudl]

well mine goes away for the most part after about 5 minutes of driving...guess when its warm it wants to stop making noises lol. also mines really annoying because it happens no matter what im doing at that speed...coasting, accelerating, braking, foot off the gas and brakes to slow down...so no matter what at those speeds it makes that fluttering sound.

just really weird that it happens just at those speeds...although i feel like the car does shake ever so slightly at higher speeds where my water bottle is shaking in the cupholder.

I can understand why the dealer has a difficult time "replicating" the sound. I've been attempting to document when the sound is the loudest. I, too, get the fluttering sound between 28 and 32 mph. However, the flutter seems to be affected and made less loud or eliminated altogether by certain factors.
1. After the car has been run then turned off and restarted. ( that will frustrate someone trying to replicate)
2. Humidity. The higher the humidity, the softer the sound.
3. Temperature.
4. After the car has been driven awhile.
Anyway, this has been my experience. Nobody seems to know what causes the sound. It isn't affecting anything except my frustration level.

 

[MyGenesis5L2015]

Long term update. I'm not use to forums ... as a matter of fact this is the only one I'm a member of.

Anyway, the repairs to my 2015 Genesis 5L seemed to have solved the fluttering problem that I previously reported and described.

In summary,, when initially driving the car cold and lifting off the accelerator pedal and coasting, there was a fluttering noise for about the first 20-30 minutes until the car was warmed up. Then no noise was heard. I know I reported that the manager removed all contents from the center console and left it open while test driving and then could hear the fluttering noise as described. For me, I could not hear a significant difference.

They basically replaced the drive shaft from the transmission to read differential. I think there is a coupling or U joint directly under the center console and I'm suspicious that was the issue. I theorized that after some time, that joint experienced some wear putting it out of spec which caused it to wobble. After that joint heated up and expanded, then the wobble dissipated and no noise was audible to my hearing capacity. Again, this is my theory and is just based on some basic physics. That is: noise is only produced due to vibration. What that vibration is was or is, I don't know.

I asked if there were any design changes to resolve this issue and was told no the parts are just as the original installed. I expressed concern because if there are no design changes to solve the root cause of the problem, then I expect for this issue to resurface again.

Fortunately I do have the extended warranty so if I have an issue I will take it back and have them fix it as many times as needed as long as I own the car.

One thing to consider when taking it in to demonstrate the issue, make sure the person riding with you can hear. Because I told the service manager that rode with me the first time we needed to get someone in that was younger that could hear. I'm not making fun of not being able to hear, I expect to be like that soon, father time never stops.

Just to demonstrate the hearing example on another issue, I took the the car in because one of the electric cooling fans is failing and I demonstrated it to the same manager and he could not hear it. In case you are experiencing that issue here are the details:

After running the car normally in hot weather (Florida ) in which the AC and engine cooling fans are running a lot (in traffic) when I go to turn the car off and almost immediately open the drier door, one of the cooling fans can be heard spinning down but squeaking with each revolution. I gave it to the dealer to fix and they say they can not find the problem. I instructed them to document it so that when I bring it the car back sometime in the future with one of the cooling fans with seized bearings, I will ask them to replace it at no charge.

Sorry for the long delay.

So far no more fluttering noise, but I only have about 64K miles on it now. However, I do have a heavy foot and I know that has to add extra stress to the drive train.

I hope this helps.

Take care.

 

[Jb15Genesis]

There is a fluttering sound that I hear between 25-30mph and I cannot determine where it is coming from. It doesn't seem to be in the cabin. From my limited 'testing', it only happens when decelerating gradually (either coasting or braking lightly). Once I push the gas pedal, the sound goes away even at the same speed. Step off the gas, the sound comes back.

I believe I have seen other threads where this is mentioned. Has anyone else noticed this? Is there a remedy? It's driving me (and consequently my wife) crazy.

I had the same problem and it was driving me crazy. Turns out it was a from a backing plate behind the driver side front brake rotor. It had bent and was rubbing the rotor. Flutter sound was super annoying and occurred between 27 and 31 mph on accel, decel, and while coasting. They adjusted the plate and the sound seems to have gone away!!!

 

[ODONO]

Hi all from the UK thanks for letting join your forum been looking at the posts and video re fluttering I have the same noise coming from my 2020 GT RWD Stinger not sure if the platform is the same as the Genesis but I suspect it may be, also the details are identical when car is cold 25 to 30mph then goes after 10mins my dealer has been unable to replicate the sound (as per normal) but as the roads where I live are new compared to the dealers area so it drives me mad every morning looks like the drive shaft is the problem, can I ask did anyone just have the bearing replaced only and did that work? not sure if I can get Kia to replace complete driveshaft KEEP SAFE.

 

[dboz1031]

No drive shaft repairs (I've had 4) has done anything to help the problem. 100% convinced its the torque converter. I can tell parked in my garage when I start my car in the morning if I will have the shudder. I can feel it in the transmission and since I am not moving that means its the converter. There are probably too many cars and I am sure its expensive to replace so they just play dumb with the cannot replicate. Last time they told me they could not reproduce, I left the dealer and it was horrible shaking leaving their lot. I think its what they are told to do now.

 

[In-House Bob]

But but but... Most everyone talks about the drive shaft and related parts being involved/replaced, but in my car, the noise is a consistent rhythm. It doesn't speed up with higher REVs or slow down as REVs drop. It sounds the same at whatever speed or RPM. It shows up at 25 or so and goes away at 35 or so. Sometimes it is very loud and sometimes it is very subtle. It generally does go away after five minutes or so of driving. The radio helps eliminate the problem
So if it's related to the spinning drive shaft (or brake part rubbing on the disc as one person suggested), why doesn't it thump faster as you accelerate?
Edit... I see dboz's post went up while I was typing. I dunno nuthin' about no torque converters so I can't speak to that theory. Let us know what you find.

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[G-405345]

In-House Bob,

I had the very same issue per your diagnosis, and it went away after the propeller-shaft assembly, commenting that they get a lot of those requests. But, do read other users' comments above, I think ArcMan and others are more in-depth. My Genesis has 53,000 miles and has never fluttered since replacing the driveshaft assembly at 12,700 miles.

 

[ODONO]

Many thanks when i watched the video it was exactly the same noise, played my noise and the Genesis noise to the dealer he agreed its the same so car booked in Jan I asked how there going to sort it and they said they would run it at 27mph on the ramps from cold hopefully it will do the noise, when in the past I've drove with the tec after leaving car at dealers overnight so its cold, the roads are not good and by the time you get to a smooth road the car has warmed up so no chance. keep safe

 

[dboz1031]

My car is not a flutter, its a shake and it does it regardless of temp or warm up but is less noticeable and subtle after warm up, its still there though.

 

[osnv]

My car is not a flutter, its a shake and it does it regardless of temp or warm up but is less noticeable and subtle after warm up, its still there though.

Has the attached TSB been performed?

 

[SappG]

Having to take my car to the shop here a noise in the center between 25 to 35 mph. Any idea how much the cost is at the dealer maybe for a new shaft? Will be out of pocket, I am the second owner or is it possible to get Hyundai to warranty it car has 84k?

 

[MyGenesis5L2015]

Sorry, I don't know the cost. I bought the car new and the extended warranty. I did ask the service manager if the parts were redesigned to resolve the root cause of the issue that I experienced. He said no that they are the same as OEM.
My response was well then I expect the same issue again and will bring the car back expecting the dealership to make the repairs, at no cost.

Noise versus speed. I understand what others have commented and the only theory that I can propose is that the components are heating up and expanding and as a result the tolerance that was creating audible noise is diminished and becomes no longer audible. My car exhibited no discernible driving issue when it had the noise. It may have if nothing was done to correct the issue. Also, remember that noise is caused vibrations and when my car exhibited the problem the pitch of the flutter noise went from a higher to lower as the car slowed (35 to 25 mph) which may point to speed/rotation. I would put the car in neutral and rev the engine with no change (the noise was still exhibited from 35 to 25 mph). I would put it into different gears and the problem still exhibited itself but would diminish faster due to engine breaking with lower gears. When I reached 35 mph and let off the gas the issue could be heard, then I would lightly touch the gas (not accelerating) and the noise seemed to almost go away. I could repeat this until the car (drive shaft and components) heated up.

Also, I do remember reading a previous post that some repairs do not replace all driveshaft components. For my car, I was told that all components were replaced.

I hope this helps and I know it is frustrating.

 

[SappG]

Sorry, I don't know the cost. I bought the car new and the extended warranty. I did ask the service manager if the parts were redesigned to resolve the root cause of the issue that I experienced. He said no that they are the same as OEM.
My response was well then I expect the same issue again and will bring the car back expecting the dealership to make the repairs, at no cost.

Noise versus speed. I understand what others have commented and the only theory that I can propose is that the components are heating up and expanding and as a result the tolerance that was creating audible noise is diminished and becomes no longer audible. My car exhibited no discernible driving issue when it had the noise. It may have if nothing was done to correct the issue. Also, remember that noise is caused vibrations and when my car exhibited the problem the pitch of the flutter noise went from a higher to lower as the car slowed (35 to 25 mph) which may point to speed/rotation. I would put the car in neutral and rev the engine with no change (the noise was still exhibited from 35 to 25 mph). I would put it into different gears and the problem still exhibited itself but would diminish faster due to engine breaking with lower gears. When I reached 35 mph and let off the gas the issue could be heard, then I would lightly touch the gas (not accelerating) and the noise seemed to almost go away. I could repeat this until the car (drive shaft and components) heated up.

Also, I do remember reading a previous post that some repairs do not replace all driveshaft components. For my car, I was told that all components were replaced.

I hope this helps and I know it is frustrating.

I took it to the dealer yesterday and the cost given $1763. I will request the old part and speak to the tech there to determine what the actual problem maybe. There’s only one set of u joints and I am wondering if that’s the issue? I am ordering the part myself which will save me $300 more. Just hoping with COVID-19 will receive the part in the time frame given. If all goes as planned who to have the car back end of next week.

 

[MyGenesis5L2015]

I hope it all works out for you.
See attached image of undercarriage.
I do not know if this picture is totally accurate, but I think it is a good representation and helps give a visual.

 

[SappG]

I hope it all works out for you.
See attached image of undercarriage.
I do not know if this picture is totally accurate, but I think it is a good representation and helps give a visual.

Couldn’t see picture.

 

[MyGenesis5L2015]

One more try,