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Discussion Starter · #1 ·
Hello gents,

I'm looking for guidance.

I went for my regular oil change and I asked my dealer to look for a strange vibration coming from the front wheels mostly noticeable at 30KMh and over 70. He diagnosed a vibration coming from the tranny. Wheel bearing are fine and tires and brand new (Toyo Tourevo) and freshly aligned.

Someone had this problem?

My dealer opened a case with Hyundai Canada to have my tranny changed.

Let me know if you had similar issue that can prove right or wrong my dealer.

BTW, Sonata NF 2010 I4, 5 speed auto trans. 50,000KMs

Thanks,

Charles
 

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Do Sonata's have a magnetized tranny plug? If so, might want to check to see if there is any metal filings on plug, that could indicate a problem with the tranny.

Also, I would get a second opinion from a tranny shop. They might be able to eliminate the tranny as the cause of the vibration. 30K miles seems way too soon for a tranny to go bad.
 

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Dear Charles,

I concur with my esteemed colleagues. Go for the obvious fixes first...wheel out of balance, front end alignment, even an outboard CV joint failure makes more sense than a tranny failure at 50 kms.

Byron
 

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Discussion Starter · #5 ·
Hi guys,

Thanks for your input so far.

Things I should have mention:

- Tire balance were checked twice, and very good.
- Tire roundness checked, and perfect, this is what I expected from Toyo Tourevo anyway.
- Tranny was drained and no metal chips found, even the smalest.
- Alignment was made the day before my visit.
- When moving at 30 KM/h (this is very slow right) I feel like I'm moving on square shaped pavement.
- When turning by hand the right wheel, it does not turn as smooth as the left.
- They checked with a high resolution microphone and confirmed the noise was coming from the tranny side, not the wheel.

I only have the car since 43,000 kms where I bought used and came with winter tires. When I tried the car, I though the winter tires was causing that noise, when I put the summer tires I realized something was wrong.

Let me know if any other ideas.

Charles
 

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Personally I would let the dealer do their job. If they have diagnosed it as a transmission issue then there is a very good chance that is what it is. They would not make that decision in haste as they will not get any bonus points from Hyundai Canada for making warranty claims that are not necessary. Besides they would rather do customer pay work than warranty work because it pays better so if there was any chance it was something they could charge for rather than cover under warranty they would have gone that route.

I have not heard of any major issues with the durability of the transmissions in the NF Sonata. As with any manufactured product there will be some with defects; maybe you are one of the unlucky ones but at least it will be taken care of under warranty.

I hope that it will be taken care of to your satisfaction.
 

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I used to ride shotgun when they needed someone to listen to the stethescope at Uncle Frank's garage. I've never listened to a front wheel drive car (this was in the 70's whilst going to school) but if they used the stethescope on the car, they know what they're doing. It's the best way to isolate a noise.
 

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Hi guys,

Thanks for your input so far.

Things I should have mention:

- Tire balance were checked twice, and very good.
- Tire roundness checked, and perfect, this is what I expected from Toyo Tourevo anyway.
- Tranny was drained and no metal chips found, even the smalest.
- Alignment was made the day before my visit.
- When moving at 30 KM/h (this is very slow right) I feel like I'm moving on square shaped pavement.
- When turning by hand the right wheel, it does not turn as smooth as the left.
- They checked with a high resolution microphone and confirmed the noise was coming from the tranny side, not the wheel.

I only have the car since 43,000 kms where I bought used and came with winter tires. When I tried the car, I though the winter tires was causing that noise, when I put the summer tires I realized something was wrong.

Let me know if any other ideas.

Charles


Hello?

Do you still have this problem? Or do you have any reliability issue related with this?

I have exactly the same issue with my 2010 Sonata now.

I am afraid the vibration at 20 mph is a little louder than a month before.
 

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Check Inner CV joints, which attach with Transmission if you hit pot holes or bumps etc may be cause to go bad,OR Check also Transmission mount/Rear mount which is attach or near transmission.do you feel any abnormal operation in transmission,slipping or jerking,what is the condition of transmission fluid?change always geniune ATF SPIII?
 
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