Shimmying/Shaking Over 60 MPH

[princelybug]

My first Genesis was like that. Not real bad but noticeable. Balance did little but new tires fixed it.

I wish new tires were the answer. I've replaced them (due to age), and have had them balanced 3x (non-Road Force), and they still vibrate along the exact same range.

My guess is that getting aftermarket wheels and leaving out the TPMS would give me the best shot at well-balanced tires.

 

[AlbinoMeatpod]

I wish new tires were the answer. I've replaced them (due to age), and have had them balanced 3x (non-Road Force), and they still vibrate along the exact same range.

My guess is that getting aftermarket wheels and leaving out the TPMS would give me the best shot at well-balanced tires.

I wonder if the 2020 G90 wheels fit the 2017-2019 G90? Also, are the 2020 wheels an improvement?

 

[princelybug]

I wonder if the 2020 G90 wheels fit the 2017-2019 G90? 100%

Also, are the 2020 wheels an improvement? Can't say for sure, but I HIGHLY doubt it. HIGHLY.

 

[princelybug]

I wonder if the 2020 G90 wheels fit the 2017-2019 G90? Also, are the 2020 wheels an improvement?

I wonder if the 2020 G90 wheels fit the 2017-2019 G90? Also, are the 2020 wheels an improvement?

 

[G-18493]

I had same issue with my 2017 G90 Ultimate. I took the car into nearby Hyundai/Genesis dealer and they re-balanced the tires, rotated them, aligned the car to Genesis OEM specs(eerily similar to BMW 7 series alignment specs). Car feels smooth at all speeds, except at 75-80 mph. I think it's related to harmonics in the chassis caused by the elongation of the existing platform. The car is silky smooth well into triple digits.

 

[princelybug]

Any reasonable solution anyone can suggest?

 

[Goaterguy]

I wish new tires were the answer. I've replaced them (due to age), and have had them balanced 3x (non-Road Force), and they still vibrate along the exact same range.

My guess is that getting aftermarket wheels and leaving out the TPMS would give me the best shot at well-balanced tires.

why don't you try a Road Force balance? Seems like the best cheap option.

 

[princelybug]

why don't you try a Road Force balance? Seems like the best cheap option.

Posts 36, 37, & 38.

 

[pmckechnie]

I have had the same problem with 60 mph and up vibrations. This was on my 500SEL Mercedes. I went thru every thing I could think of. New tires, wheels (used), Road force balance, alignments, drive shaft rebuilds and balance, etc and nothing helped. I lived with this for many years. 8 years ago, we retired and closed our shop. I kept my wheel balance machine and other equipment I thought I may need. Actually got closed at the end of Feb 2012. Some wear around the middle of 2012 I pulled my Mercedes in the garage and made up my mind that I was going to find this problem.
I checked for bent wheels, out of round tires, bent hubs front and rear. Found a bent wheel, a front hub bent. Replaced both, knowing I had found the problem. Well, I did't find the problem completely. Still had the vibration, but not as bad.
Next was to go to the balancer. I found a good flat place to set it up. Read the book and set it up and calibrated it as good as I could. Checked and rechecked it. Then I read about the round off feature of the balancer which would round off to the nearest 1/4 ounce. I found out that could be turned off. I also was able to change to the metric system and get readings in grams. Found some accurate scales that would go down to 1 gram. That is almost nothing. I balanced all 4 tires (almost new Mich tires) down to 1 to 2 grams.
I used rim type balance weights and cut, filed, sanded, or what ever I could do to be as close as I could get to what the balancer said. That was 8 years ago and to this day the old (35 years old) Mercedes will glide down the road (good road) at any speed from 0 to over 100+ mph as smooth as glass.
The point of all of this is that you need to find someone that will take their time and check and balance the tires as close as possible. Not just put it on a balancer and say every thing is good. Some cars are just more sensitive than others.
I have not seen another car this critical, but I am sure there are others.

 

[Kraig Wilkinson]

I have had the same problem with 60 mph and up vibrations. This was on my 500SEL Mercedes. I went thru every thing I could think of. New tires, wheels (used), Road force balance, alignments, drive shaft rebuilds and balance, etc and nothing helped. I lived with this for many years. 8 years ago, we retired and closed our shop. I kept my wheel balance machine and other equipment I thought I may need. Actually got closed at the end of Feb 2012. Some wear around the middle of 2012 I pulled my Mercedes in the garage and made up my mind that I was going to find this problem.
I checked for bent wheels, out of round tires, bent hubs front and rear. Found a bent wheel, a front hub bent. Replaced both, knowing I had found the problem. Well, I did't find the problem completely. Still had the vibration, but not as bad.
Next was to go to the balancer. I found a good flat place to set it up. Read the book and set it up and calibrated it as good as I could. Checked and rechecked it. Then I read about the round off feature of the balancer which would round off to the nearest 1/4 ounce. I found out that could be turned off. I also was able to change to the metric system and get readings in grams. Found some accurate scales that would go down to 1 gram. That is almost nothing. I balanced all 4 tires (almost new Mich tires) down to 1 to 2 grams.
I used rim type balance weights and cut, filed, sanded, or what ever I could do to be as close as I could get to what the balancer said. That was 8 years ago and to this day the old (35 years old) Mercedes will glide down the road (good road) at any speed from 0 to over 100+ mph as smooth as glass.
The point of all of this is that you need to find someone that will take their time and check and balance the tires as close as possible. Not just put it on a balancer and say every thing is good. Some cars are just more sensitive than others.
I have not seen another car this critical, but I am sure there are others.

Nice right up Pmckechnie !

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[Kraig Wilkinson]

I have had the same problem with 60 mph and up vibrations. This was on my 500SEL Mercedes. I went thru every thing I could think of. New tires, wheels (used), Road force balance, alignments, drive shaft rebuilds and balance, etc and nothing helped. I lived with this for many years. 8 years ago, we retired and closed our shop. I kept my wheel balance machine and other equipment I thought I may need. Actually got closed at the end of Feb 2012. Some wear around the middle of 2012 I pulled my Mercedes in the garage and made up my mind that I was going to find this problem.
I checked for bent wheels, out of round tires, bent hubs front and rear. Found a bent wheel, a front hub bent. Replaced both, knowing I had found the problem. Well, I did't find the problem completely. Still had the vibration, but not as bad.
Next was to go to the balancer. I found a good flat place to set it up. Read the book and set it up and calibrated it as good as I could. Checked and rechecked it. Then I read about the round off feature of the balancer which would round off to the nearest 1/4 ounce. I found out that could be turned off. I also was able to change to the metric system and get readings in grams. Found some accurate scales that would go down to 1 gram. That is almost nothing. I balanced all 4 tires (almost new Mich tires) down to 1 to 2 grams.
I used rim type balance weights and cut, filed, sanded, or what ever I could do to be as close as I could get to what the balancer said. That was 8 years ago and to this day the old (35 years old) Mercedes will glide down the road (good road) at any speed from 0 to over 100+ mph as smooth as glass.
The point of all of this is that you need to find someone that will take their time and check and balance the tires as close as possible. Not just put it on a balancer and say every thing is good. Some cars are just more sensitive than others.
I have not seen another car this critical, but I am sure there are others.

I think having 8 ball joints on the G80 might make these cars extra sensitive to tire issues.

 

[PCrews]

Thanks. I hope it’s fixed, too. Been dealing with this issue for months.

jda8 - did you resolve the problem. I just purchased a new G90 2019 model that has been sitting in the showroom. I have noticed the same shimmy between 66 and 74 mph at 330 miles on odometer. was told it was flat spots on tires so drove another 500 miles, no change. dealer replaced all four tires. I still feel it, maybe a bit less (maybe just hoping.)

Just curious if you have found the root cause.

 

[jda8]

jda8 - did you resolve the problem. I just purchased a new G90 2019 model that has been sitting in the showroom. I have noticed the same shimmy between 66 and 74 mph at 330 miles on odometer. was told it was flat spots on tires so drove another 500 miles, no change. dealer replaced all four tires. I still feel it, maybe a bit less (maybe just hoping.)

Just curious if you have found the root cause.

Yes, the dealership finally fixed it. It got kind of ugly. The first thing that happened was they put a new set a tires on it, but it still continued to shake and shimmy. I was absolutely furious. I got in my car, drove it back to the dealership (2.5 hours away), handed the service guy my keys, and told him that I didn’t want to hear from him until the problem was solved. A few days later, they called me to inform me that the most recent set of brand new tires were bad. I have no idea if they were being honest with me or not and it sounded ridiculous. So, they put yet another new set of tires on it and then did a road force balance. After that, the problem was solved.

 

[princelybug]

Seems like the Road Force is the most viable solution to this issue.

 

[Kraig Wilkinson]

Seems like the Road Force is the most viable solution to this issue.

I have been looking for a shop whom uses road force balance machine , no luck?? Lots of folks have no idea what I am talking about when I ask .

 

[princelybug]

I have been looking for a shop whom uses road force balance machine , no luck?? Lots of folks have no idea what I am talking about when I ask .

Road Force® Locator | Hunter Engineering Company®

Here are 2 within 30mi of Pierre (not sure where in SD you live, Kraig)

WEGNER AUTO CO INC
330 E. SIOUX AVE.
PIERRE, SD 57501
(605) 224-9900

LAMB MOTOR CO INC
109 MAIN ST.
ONIDA, SD 57564
(800) 952-2222

 

[Kraig Wilkinson]

Road Force® Locator | Hunter Engineering Company®

Here are 2 within 30mi of Pierre (not sure where in SD you live, Kraig)

WEGNER AUTO CO INC
330 E. SIOUX AVE.
PIERRE, SD 57501
(605) 224-9900

LAMB MOTOR CO INC
109 MAIN ST.
ONIDA, SD 57564
(800) 952-2222

I am about 3 and half hours from Pierre. Thanks for the info Princleybug. When I get new tires for the Genny I think it would be worth the trip. This forum and the members here are a great source of knowledge.

 

[princelybug]

I am about 3 and half hours from Pierre. Thanks for the info Princleybug. When I get new tires for the Genny I think it would be worth the trip. This forum and the members here are a great source of knowledge.

Glad to help! Click on the link and put in your zip code. You may find a shop much closer to you than Pierre or Onida.

 

[jda8]

Seems like the Road Force is the most viable solution to this issue.

I agree.

 

[Kraig Wilkinson]

Glad to help! Click on the link and put in your zip code. You may find a shop much closer to you than Pierre or Onida.

Will do just that.