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Hyundai Sonata Transmission Problems



  • agcg88agcg88 Posts: 3
  • My '09 just bought with 45k miles shifts harsh and the car clunks from 1-2 shift. 2-3 is not as bad and the rest of upshifts are okay.
    Do also notice some weirdness when slowing down, as if maybe the tranny cannot figure out exactly what it's supposed to be doing, or what gear to be in as I slow down.
    My 9th car and never had tranny issues before, so this is weird to me.
    Maybe it's all the electronic controls - hopefully not a mechanical thing. It's under warranty, but still...
  • iola54iola54 Posts: 1
    have you gotten anywhere with your letter about the transmission in your 2009 sonota? Im have the same problem. Please let me know
  • delbardelbar Posts: 32
    interesting forum here, just figured I would post to let you all know - I have been reading the Camry forum for months now -
    figured I would research Sonata as I am so tired of the rough shifting Camry, so it seems the Sonata has the same issues!!!!
    rough downshift at 35 mph and 25 mph - acceleration sluggish at times and smooth at others -"whiny" noise from engine when pressing gas pedal
    idles very high until warmed up - (start car about five minutes before
    I need to drive it - back to the dealership three times since purchased 4 months ago and it just goes on and on - and of course they cannot duplicate the issues. Any issues they can duplicate they deem "NORMAL"
    about ready to take the city bus !!
  • I have a 2009 Hyundai Sonata v6 and at 18000 miles had to have my transmission replaced, am now at almost 19000 miles and my car is doing the same thing again and now it is starting with a slight shutter and it revs up and down when i first start it. Im glad Hyundai has a good warranty cause i have a feeling im gonna use it alot as i cant afford to trade it in.
  • FYI: Just bought a brand new 2011 Sonata. As of today, 2/26/11, the car has right at 3,000 miles. I haven't even owned the car 30 days and it has not even had it's first oil change! As of 2 days ago it is at the dealership with the identical transmission problem everyone here is writing about.

    I was on my way to work traveling about 45mph when it "felt" like the car hit a cinderblock! After that, the transmission would not shift at all, stuck in (what the dealer calls) a limp-home mode. I drove it straight to the dealership. They told me that the transmission needed a shifter solenoid and that the part was on "National Backorder." They MAY be able to get one in about 2 weeks, but they have to go to the manufacturer to get it!!!
    Sounds like a pretty popular part if you ask me.

    Between my wife and I we have owned 5 Hyundai vehicles: 3 Sonatas and 2 Elantras. I still own a 2004 Sonata as well as a 2004 Elentra (the 2011 Sonata makes 3 currently vehicles owned). We have put over 150,000 miles on each previous vehicle with no problems and only regular maintenance. With all the problems I read about concerning the new Sonata transmission, I'm beginning to wonder if I made the right choice with this car!
  • jackiechjackiech Posts: 7
    Yes, I have the same problem with my 2009 Sonata. Before I stop sometimes, the transmission will gear down fast and give me a little kick. I have been wondering if anyone else has been having this problem.
  • jackiechjackiech Posts: 7
    edited March 2011
    Yes, I have been having this problem for a couple of months. I thought I had gotten some ice, dirt, or snow on my brakes during the winter storms in our area. My mechanic checked the brakes and didn't find any problems. I have an appointment this week with the dealer, but I may call the company first. You are not the only one having this problem.
  • Yes, many others on this forum (and the Hyundai forum) have complained about the "harsh downshift" issue. My dealer reset the transmission's "Adaptive Learning" which is how the transmission reacts to your individual type of driving and it worked well for me. There are now smoother and less frequent/annoying shifts both up and down and that harsh downshift only occurs once in a while. I suggest asking your dealer to reset the adaptive learning (if they don't already) after they check for factory updates your vehicle might require.
  • agcg88agcg88 Posts: 3
    Here is an update on my 2009 Sonata. After three attempts to reset the computer etc., they have replaced my transmission at 25000 miles. When we went to pick it up, it was still slipping!! we had to take it back and they again, had to reset the computer. They act like they don't know what they're doing. This is the second dealership we've dealt with.
  • jackiechjackiech Posts: 7
    I have a 2009 Sonata with 30,543 miles. I have been having this gearing trouble for a couple of months. I called Hyundai's company (1-800-633-5151) and told them other people are having the same problem. Everyone needs to call and report this to them.
  • jackiechjackiech Posts: 7
    I have been having the same problem with my 2009 Sonata for about three months. I thought it was my brakes, but my mechanic checked everything out. I called the dealer and they suggested I have the transmission fluid changed. The manual says replace at 105,000. My car has 30,354 miles. I have called the Hyundai's company (1-800-633-5151) and filled a complaint. I suggest that everyone else do this, too. Please add my complaint to your list.
  • The same thing happened to me. I was driving along about 50 mph and it too felt like I hit a cinderblock and then I noticed the motor was turning about 3000 rpms as opposed to the 1500 it normally did at 55 mph. My sonata was purchased in Nov 2010. I have made 4 payments on it and it has only 11,000 miles. After reading these posts I am not certain I will keep this car. I am so irritated because consumer reports and everyone else rated this car as top notch which is part of the reason I chose to go with the Hyundai as opposed to my usual Honda or Toyota. GRRRRRRR
  • jackiechjackiech Posts: 7
    I'm taking my 2009 Sonata in April 1st. Is there a recall on the transmission flasher? Where do I go on the internet to find out?
  • geobluegeoblue Posts: 71

    We have a 2006 Kia Optima at around 68K miles. I am thinking of at least having a drain&refill for the transmission fluid.

    Kia, like Hyundai specifies SPIII ATF. Is that a must? Redline claims its D4 ATF can be used where SPIII is required.

    Has anyone had experiences with Redline D4 or any other ATF on the one hand and with SPIII on the other?

    Should I just have a drain&refill done or should I get a flush?
  • I have a 2009 Hyundai Sonata as well. I have been having the same problem since August 2010. I have had my car in 8 times to a local Hyundai dealer and have been in contact with Hyundai corporate. I have nothing good to say about either one. It took me driving my car for the mechanics to show them the issue with the transmission lurching in a down gear. They failed to "duplicate" the problem the 7 times they had driven my car. After getting on Hyundai's case they finally put a remanufactured transmission in my car that failed to fix the problem. Not only did it fail to fix the first problem, it now shifts hard between 2nd and 3rd gear. We have caught Hyundai in 3 lies since we have been dealing with them and called them on the carpet each time. This is the worst company I have ever delt with and suggest everyone thinking of buying a Hyundai to CHANGE YOUR MIND!!! BAD BAD BAD company!!! Worst customer service and very unknowledgable mechanics!!! After researching Sonata transmission problems I see a lot of people are having the same exact issue and Hyundai is well aware of this. They are just failing to look into the problem and have a recall. Good luck with everything! My car will be going back AGAIN tomorrow for the 9th time since October..... Not to mention my car has been in the shop 27+ days of the 8 months I have had the car.... Not cool...
  • I started having the downshift issue in the beginning of winter this year - I had about 30K miles on the car at the time. It would downshift at 1000 rpm when slowing down for a stop sign and then buck forward. I kept meaning to bring it into the garage and finally a week ago brought it to a local garage and they told me it was the transmission. I made an appt with my local Fuccillo Hyundai dealer (very nice people that I dealt with) when I called they told me that there IS a recall on this particular make and model so they were going to check my complaint and they were also going to fix what was recalled. This is what it says on my receipt as to what they did:
    Check for open campaign TB7
    Automatic Transaxle ECM & TCM update TSB # 10 - 01-023 (service campaign TB7)
    Campaign open
    2009 and 2010 Sonata 2.4L (NFA) vehicles with automatic tran
    production date range 12/17/2007-10/05/2009
    Perform ECM & TCM upgrade as per campaign TB7 10BA23RO 0.3

    Basically they said they needed to update my computer. I did this on 03/28/11 and do not have the problem anymore. I have read that people have had this done and the problem left then came back. I will keep you posted. I am going to post the name & number of my dealer just in case you want your dealer to call them to get the info or anything
    Fucccillo Lincold Mercury - 518-382-0274
    Good Luck!!
  • Just wondering if anything was resolved with your 2011 Sonata, the same thing has happened to me. 1st time was when I had only had the car for about a month and was going about 35-40 and there was a big BANG and felt like I hit a cinder block... Next time was just the other day going about 80 on the freeway - just about gave me a heart attack - same thing. Taking the car to the dealership tomorrow. Wish me luck...
  • Just wondering if anything was resolved with your 2011 Sonata, the same thing has happened to me. 1st time was when I had only had the car for about a month and was going about 35-40 and there was a big BANG and felt like I hit a cinder block... Next time was just the other day going about 80 on the freeway - just about gave me a heart attack - same thing. This time the transmission was stuck in 4th gear - would not move. Let it sit overnight and the next day, its working fine. Go figure... Taking the car to the dealership tomorrow. Wish me luck...
  • At 24,000 miles my 09 Sonata V6 started the jerky transmission shift. Dealer replaced transm. Now at 45,000 same thing is happening. Did anyone every get a solution? Do I try another transmission replacement?? Has anyone discovered the solution to dealing with Hyundai about this. I cannot find anything about a recall.
  • mine is doing the same thing what do i do?
  • See post #232

    My dealership said there was a recall on this problem I had my transmission re-set (computer) and so far I have not had the issue again. I posted the phone number for my dealership if you want to call them to get any specifics. The resetting of the computer has helped most people but some have said they are still having issues.
  • Bring your car to the dealership - see post 232 and tell them to do what is posted. You shouldn't have to tell them though it is a recall and they should be able to look it up.
  • mel71mel71 Posts: 3
    Thank you for your information. I have a 2009 Sonata and my transmission is doing the same thing. Primarily when it is cold, and I am coming to a stop, at about 20 mph the tansmission derks down into 1st gear which causes me and passengers to fall forward, like someone hitting the brake hard. As it warms up it is not much of a problem.
    I called your dealer and he said my VIN number is not included in that recall campaign, but yet my car is doing exactly the same thing. I am working with a local dealer and asked them to contact Hyundai to see what can be done. It is very frustrating when a car manufacturer knows they have a problem yet does nothing about it. They just don't want to do a major recall for all 2009 and 2010 Sonata's and have to replace the transmission in every one!

  • mel71mel71 Posts: 3
    My 2009 Sonata is doing the same thing. So far, my dealer said they don't see a problem as it typically almost goes away when the car is warmed up.
    My car has about 51,000 miles on it.

    Mel71 (April 19, 2011)
  • leahcimleahcim Posts: 10
    I too have an 09 Sonata with 32K miles and it has started to downshift hard at about 20 mph. It's gratilfying to hear that it is only a computer fix. I plan to go in next week to see what my Hyundai dealer has to say about the problem.

    I'll let you all know what I get done.
  • You need to tell them you need a computer update - mine did the same thing - when it warmed up it would go away - if you get the update you won't get it at all.
  • mel71mel71 Posts: 3
    Thanks Julie. Please let me know what you get done to your 09 Sonata. According to Hyundai, my particular 09 Sonata is not on the list (based on VIN number) to have the reprogramming to the transmission. However, another dealer is going to look at it as soon as I can get it in.

    Please keep me posted.

  • jackiechjackiech Posts: 7
    I took my 2009 Sonata into the dealer about 3 weeks ago. They changed the transmission fluid and it hasn't downshifted since.
  • leahcimleahcim Posts: 10
    Thanks jackiech! I have an appointment on the 13th of May for getting my annual PA state inspection and to have them look at the tranny.

    I'll let you all know what they do for me to fix the problem.
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