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Noting I had my car in the shop for this, and they reset the adaptive values. Picked it up last week, this past weekend the issue popped up again and I captured it on video. As someone else mentioned, it's hard to tell from the video what's happening because you can't really hear the issue, as it's a more physical jolt.

Anyway, emailed the dealer, waiting to hear back on next steps. Mine is a 2017, so not sure the solenoid issue is relevant but I referenced it anyway in my email.
 

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Are you sure you're not confusing this with "TCC chuggle", which is the torque converter being unable to decide whether to lock or unlock during a shift?

If I decelerate my car to a crawl (think underground parking lot speeds) without fully stopping, then try to takeoff very gently, I get a noticeable thud. I never have this issue on the highway or during routine urban driving.

Mine is a 2019 model.
 

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Noting I had my car in the shop for this, and they reset the adaptive values. Picked it up last week, this past weekend the issue popped up again
Persistence is key. They told me to pick up my car several times during the 44 days and I refused. Remember to call the Service Director daily, request they test drive the vehicle 3X per day, have the Service Director contact the district rep and escalate it to the field service engineer. The field service engineer can approve TSB's without duplicating the problem. Contact the National Consumer Affairs (714) 965-3179 Hyundai Motor America and get a case number, call them every 2/3 days.


Mine is a 2017, so not sure the solenoid issue is relevant but I referenced it anyway in my email.
2017 does have a 19 power train related TSB's. You can review all 72 TSB's here:
 

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I spoke with the service manager today, he said the documenting doesn't really help him if they can't replicate the issue I'm the shop. We decided I'd start the car and run it multiple times a day and just drive it over once I experience the issue so they can take a look. That way I can control how often it's being tested without just leaving it to his team. I'll let y'all know when I have an update, but the manager did say it sounds like I'll need a new transmission.
 

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I spoke with the service manager today, he said the documenting doesn't really help him if they can't replicate the issue I'm the shop. We decided I'd start the car and run it multiple times a day and just drive it over once I experience the issue so they can take a look. That way I can control how often it's being tested without just leaving it to his team. I'll let y'all know when I have an update, but the manager did say it sounds like I'll need a new transmission.
Interested to see how yours goes. I have gotten a call from Hyundai corporate and had a long converstation with them. I have a video sent to my dealer and i have to drop the car off to them. Fighting the fight. If yours does happen to do it on a trip, what i did was record the tachometer\speedometer. In my video every time the issue happened you could see the tach jump by a small amount 500RPM or less, then in a second or two it jumped up the remaining 500rpm that it should have went to originally. We recently took the car out again on vacay and had no issue on the way out till i got to the property. Shut the car off. Went in to check in and came out to move car and the car thud shifted again. However once parked and shut off, didnt have the problem the rest of the week.
 

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This week I'll be trying to replicate the issue, as it happened again twice this weekend. I'm actually a bit relieved it continues to happen, which means I'll have less of an issue with the dealer.

I did escalate to Hyundai corporate who will be assigning someone to my case. I'm hoping they'll have familiarity with the issue and be able to recommend a fix my dealer wasn't able to do yet.

I'm at 58k miles, so nearing the end of the warranty and I'm working diligently to ensure it's all taken care of/documented before I eclipse 60k.
 

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Figured I'd post an update. Was able to replicate the issue this afternoon, but none of the service departments in the area were available for me to take it in to get scanned. Talk about frustrating.

I was driving around the neighborhood, and restarting the car at each stop sign to see if I could make it happen. Finally occurred on about the 5th try at a stop where I was making a hard right, and it was on an incline facing downhill. Doubt the conditions have any influence, but figured it was worth sharing.
 

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I spoke with the service manager today, he said the documenting doesn't really help him if they can't replicate the issue I'm the shop.
Not true, the the field service engineer can approve TSB's without duplicating the problem.

Finally occurred on about the 5th try at a stop where I was making a hard right
Keep a log book and report each occurance to your National Consumer Affairs contact representative.
 

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Yeah my national rep hasnt any help at all, honestly. Basically said as far as Hyundai is concerned, it's operating as it should which is pretty infuriating to hear. I've been keeping track though, and I appreciate your advice.
 

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This is a bummer to read. Mine has been at the dealership for a week now. Supposed to hear about it today. My consumer advocate has been been very good in keeping contact with me. But just not looking good as far as I can see. Really disappointed in Hyundai about this stuff. My consumer advocate told me he has heard of other cases with this. So they know its an issue. But getting anything done about it.............. thats a whole nother issue.
 

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So update on mine......... was informed today that they replaced the tranmisson range sensor switch which i believe when researching it was a recalled part. They are keeping it till at least Wed now to further test it after this replacement. I have a gleam of hope that this may fix it but honestly still have a low confidence that this is the issue. But we will see. At least something is getting done.
 

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Fingers crossed that's the solution for you, I hadn't heard of that being a possible solution but worth investigating.

My dad took mine in today while the shifting was happening (he was trying to replicate the issue during the day while I was working) then 1 mile from the dealer it disappeared. Still had the tech check it out, and apparently the tech stopped the car in the road, floored it and the bad shift happened between either 2nd/3rd or 3rd/4th. Happened a few times, and he was actually familiar with similar issues in other Hyundais.

They took it back to the service area to check for codes (there were none), and when he put it into reverse it slammed into that gear, too. The problem had only occurred for me going 1st to 2nd, so it was certainly eye opening. Very glad it happened at the dealer, though.

They're documenting things and getting Hyundai warranty to give them direction. The tech seemed to think something was loose in the transmission, maybe a screw or metal shavings, but he wasn't certain. Initial impression is I'll need a new transmission, but I'll know more when they hear from the warranty division. At this point, I don't know anything aside from replacing the unit would make me feel confident it's been fixed.

It's definitely concerning that a transmission would go bad before 60k miles. I wonder how widespread the issue really is.
 

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Fingers crossed that's the solution for you, I hadn't heard of that being a possible solution but worth investigating.

My dad took mine in today while the shifting was happening (he was trying to replicate the issue during the day while I was working) then 1 mile from the dealer it disappeared. Still had the tech check it out, and apparently the tech stopped the car in the road, floored it and the bad shift happened between either 2nd/3rd or 3rd/4th. Happened a few times, and he was actually familiar with similar issues in other Hyundais.

They took it back to the service area to check for codes (there were none), and when he put it into reverse it slammed into that gear, too. The problem had only occurred for me going 1st to 2nd, so it was certainly eye opening. Very glad it happened at the dealer, though.

They're documenting things and getting Hyundai warranty to give them direction. The tech seemed to think something was loose in the transmission, maybe a screw or metal shavings, but he wasn't certain. Initial impression is I'll need a new transmission, but I'll know more when they hear from the warranty division. At this point, I don't know anything aside from replacing the unit would make me feel confident it's been fixed.

It's definitely concerning that a transmission would go bad before 60k miles. I wonder how widespread the issue really is.
This is what i was hoping would come of mine. I am not confident that the sensor is the problem. But i guess we will see. Gotta start somewhere. Eager to see what happens with yours.
 

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Found out today the dealer requested a full transmission replacement from warranty. I'll add, though, I'll probably get a different dealer to do the work if possible. Not sure what everyone's experience has been with hyundai service, but the service manager at my local dealer is just a dick to deal with.

I'm not completely sold he's actually trying to help me, as on a call today he said there's not much to go off of, it didn't happen the first time I brought it in and only happened 'a little' the next time.

I'm sorry, my expectation is it shouldn't be happening at all. Goodness.
 

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Found out today the dealer requested a full transmission replacement from warranty. I'll add, though, I'll probably get a different dealer to do the work if possible. Not sure what everyone's experience has been with hyundai service, but the service manager at my local dealer is just a dick to deal with.

I'm not completely sold he's actually trying to help me, as on a call today he said there's not much to go off of, it didn't happen the first time I brought it in and only happened 'a little' the next time.

I'm sorry, my expectation is it shouldn't be happening at all. Goodness.
Wow. Well good for you on that then. Was hoping for that on mine as i think this is the problem with all of them. But the battle goes on.
 

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So basically my dealer had the car for a week. Shop foreman supposedly drove it multiple times. Put 250 miles on the car. And in my opinion threw the easiest to change and cheapest part to replace at it just to try and appease me. No codes or anything stored. Car of course didnt act up. So frustration will continue.... or this thing is going.....
 

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I decided not to let the dealer try to figure it out, they did a long drive with mine but didn't find anything and left me with an empty gas tank. Also, they'd start it and put 20 miles on it, then do it again without actually considering how I got the issue to popup. Like I said, this dealer has been a treat to work with.

Id say take a morning and just keep starting it until you get the issue, then drive it to the dealer to get a tech in the car and document it. Not sure if yours is under warranty, but that was the only way for me to get them to submit anything to warranty. Leaving it with them just takes control out of your hands and is such an unknown.
 

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Well if it was that easy i would have done it that way. But ours is at the really really random point that its happening. So it hard to do it the way you suggest. However if it pops up again i will be driving it directly to them. Just frustrating as its an obvious issues with these cars. This dealer is giving me a free oil change and filling the tank. Plus we have had a rental on their dime for this whole time.
 

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Im not sure exactly how random yours is, but mine was once every 30 starts or so...sometimes every 10 starts, sometimes longer. What we did was start it, drive 100 feet to see if it happened between 1st/2nd, and if it didn't we'd stop and start it again. Over and over and over.

Just a thought, at least that service team seems to care about customer service.
 

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Warranty approved the transmission replacement, and the dealer is just waiting on the parts now. Out of my own curiosity, I'm going to ask if they can check the old transmission to see what went wrong as that would be helpful information to share with y'all.

I was hopeful it was something easy like a shift solenoid (maybe it still is?), but having the full unit replaced obviously covers any possible issues. Now, if the problem is still occurring after the replacement...
 
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