Transmission issue

[maxsilver]

I wonder how common this is. A lot of people seem to have this rough shifting issue. It makes me anxious since I don't have my full warranty - feels like something like this is just waiting to happen, and I have no doubt Genesis USA would do whatever it takes to avoid responsibility for it.

That worries me a bit too. I only less than 4 years warranty remaining, and if this is some sort of an inherent risk of this car hopefully the cooler is redesigned to avoid completely destroying our drivetrains down the road.

 

[Gnarlly]

Looks like this issue may be more common than initially thought:
https://www.motortrend.com/cars/genesis/g70/2019/2019-genesis-g70-long-term-update-1-review/

Not trying to rub salt in any wounds as I feel sorry for anyone going through this issue, but things like this are one of several reasons why I try to stick with manual transmissions. When my 6MT G70 is ready to be retired (hopefully after many years), I will likely end up in an electric vehicle and never have to worry about transmission woes.

 

[FastEddie]

Wonder if it’s the early builds?

Those that are having or had the issue, what were your build dates?

 

[KptKrunch]

Wow - that's all very interesting. This would have made me re-think purchasing the vehicle. Too late now and it does get cold here (-10C today believe it or not) so I will be watching for this. Mine will be a 2020 build date, I can only hope that the issue was brought back to the Genesis engineers and has been addressed but I kind of doubt it. something like this would take at least 3 model years I would imagine - #1 to diagnose exactly why this is failing, #2 if the existing part can me modified to work properly and #3 if it can't and they have to re-engineer / re-design well that will take a while too.

Though it gets very cold here, for the most part my Genesis will be parked in a Non heated but insulated ) attached garage. I'll let you all know if I get the same type of behavior after the long winter is over (or if it happens sooner). Fingers crossed it's ok and saving the folks that already had this issue no one else gets it either. Those that have - I hope your fix is permanent!

 

[MRJONG]

So after having the car back for a couple weeks I would say that the transmission does feel much smoother than before but still not as smooth as the G80 loaner. There aren't any jolts or anything like that but braking at low speeds does sometime give me small "hiccups" where it seems like the car doesn't rev match correctly. Also when backing out of a parking spot I feel a "thump" when I start accelerating forwards, almost like the car is in neutral for a split second and then shifts into drive. I do completely come to a stop before shifting into Drive.

 

[Cgo]

And there goes reason number 2 of 2 that I chose Genesis over a german brand... expected reliability. I'm so done with this thing. My 3.3T is doing the same thing, burning smell and and all. 3000 miles.

Dont we have the same trans as the Kia Stinger? I couldn't find anything about this in the Stinger forums.

 

[Toddasaurus]

And there goes reason number 2 of 2 that I chose Genesis over a german brand... expected reliability. I'm so done with this thing. My 3.3T is doing the same thing, burning smell and and all. 3000 miles.

Dont we have the same trans as the Kia Stinger? I couldn't find anything about this in the Stinger forums.

Same tranny as the Stinger. I could have sworn I read a couple threads describing similar issues over there... Maybe I'm wrong, though. I do remember reading one thread where his transmission literally just blew up, and he had to fight just to get his car replaced (there was bad damage to the floor of the car), and it took forever for Kia to even admit to be at fault, all without having a legitimate loaner.

 

[FastEddie]

Same tranny as the Stinger. I could have sworn I read a couple threads describing similar issues over there... Maybe I'm wrong, though. I do remember reading one thread where his transmission literally just blew up, and he had to fight just to get his car replaced (there was bad damage to the floor of the car), and it took forever for Kia to even admit to be at fault, all without having a legitimate loaner.

Yea I read that too. I think his was the output shaft to the driveline if I remember. part came through the floor and he said he was just taking off down the street. Me thinks there was more to that story than he posted. Output shaft wouldn’t have been moving very fast right after driving away. I think he was hard on it or racing and it blew. I could be wrong.

 

[Toddasaurus]

Yea I read that too. I think his was the output shaft to the driveline if I remember. part came through the floor and he said he was just taking off down the street. Me thinks there was more to that story than he posted. Output shaft wouldn’t have been moving very fast right after driving away. I think he was hard on it or racing and it blew. I could be wrong.

I think he said that the dealer noticed something wasn't installed correctly, and it must have left that way from the factory. His dealership seemed to have his back, but it was Kia who were being jerks about everything.

He could very well be lying. But - I'm inclined to believe at least the possibility of it being totally true. When I was removing my downpipe for the first time I noticed that the passenger side downpipe stay bracket, which bolts the primary DP to the tranny housing, was totally loose. Since it had never been touched it had to have left that way from the factory. This wasn't a big deal at all; however, I couldn't help but think about what other bolts they forgot to torque down....


Edit: combine that with owners having the dealer diagnose transmission problems from a poorly installed/attached transmission cooler...

 

[ECF]

@FastEddie While the output shaft would be spinning slowly at startup, in 1st gear you would have the most torque coming out of the transmission. I'm not sure how much torque multiplication the torque converter in these cars provide, but assuming a torque ratio of 1.2 out of the converter during initial acceleration, first ratio of 3.67, and 376 lb-ft of torque at 2000 RPM, the transmission output torque into the shaft would be 1655 lb-ft (376*1.2*3.67). Cruising on the interstate at the equivalent 2000 RPM at 8th gear (ratio of .56) and lock up engaged (torque converter ratio of 1.0), transmission output torque would be 210 ft-lb (376*1.0 * 0.56). If the output shaft wasn't installed correctly, it's definitely possible that the high rotational forces encountered during initial acceleration could have caused it to dislodge, especially if that force were applied at an angle due to shaft misalignment.

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[FastEddie]

@FastEddie While the output shaft would be spinning slowly at startup, in 1st gear you would have the most torque coming out of the transmission. I'm not sure how much torque multiplication the torque converter in these cars provide, but assuming a torque ratio of 1.2 out of the converter during initial acceleration, first ratio of 3.67, and 376 lb-ft of torque at 2000 RPM, the transmission output torque into the shaft would be 1655 lb-ft (376*1.2*3.67). Cruising on the interstate at the equivalent 2000 RPM at 8th gear (ratio of .56) and lock up engaged (torque converter ratio of 1.0), transmission output torque would be 210 ft-lb (376*1.0 * 0.56). If the output shaft wasn't installed correctly, it's definitely possible that the high rotational forces encountered during initial acceleration could have caused it to dislodge, especially if that force were applied at an angle due to shaft misalignment.

So it’the angle of the dangle huh.

 

[mrcleeaan]

Have a little over 3k miles on my 3.3T. Two days ago while coming up to a stop sign in my neighborhood, I let it coast slowly and wasn't going to use the brakes until I needed to. I couldn't tell if it was 3rd to 2nd or 2nd to 1st gear but it was a real hard downshift that jerked me forward pretty good. I then proceeded to drive around the block and tried to duplicate it, it did it once more. I drove around the block and tried several more times after that and it didn't happen anymore. First time this has ever happened since buying the car in July 2019. Also, I did have it in Sport mode.

*Dec 2018 build date

 

[Cgo]

Have a little over 3k miles on my 3.3T. Two days ago while coming up to a stop sign in my neighborhood, I let it coast slowly and wasn't going to use the brakes until I needed to. I couldn't tell if it was 3rd to 2nd or 2nd to 1st gear but it was a real hard downshift that jerked me forward pretty good. I then proceeded to drive around the block and tried to duplicate it, it did it once more. I drove around the block and tried several more times after that and it didn't happen anymore. First time this has ever happened since buying the car in July 2019. Also, I did have it in Sport mode.

Sounds like the start of the infamous transmission issue... keep an eye on it and be careful.

 

[Toddasaurus]

Sounds like the start of the infamous transmission issue...

This is what I keep worrying about. A lot of Stinger guys talk about having that same problem. Though some think it's normal and don't worry about it, but I don't think it's normal at all... Mine has never done anything like that before. If it does, I will be super bummed.

I checked my transmission cooler when I had my bumper off, and everything looked great. Gonna double check the hose connections on the tranny itself when I change my oil (hopefully tomorrow night).

 

[Cgo]

This is what I keep worrying about. A lot of Stinger guys talk about having that same problem. Though some think it's normal and don't worry about it, but I don't think it's normal at all... Mine has never done anything like that before. If it does, I will be super bummed.

I checked my transmission cooler when I had my bumper off, and everything looked great. Gonna double check the hose connections on the tranny itself when I change my oil (hopefully tomorrow night).

Apparently the problem is internal to the cooler which cant be seen from external inspection. Mine just started skipping shifts and hard bang shifting. 3000 miles and no bueno.

 

[pulsar]

Apparently the problem is internal to the cooler which cant be seen from external inspection. Mine just started skipping shifts and hard bang shifting. 3000 miles and no bueno.

Other than maybe a thermostat, can’t imagine anything being internal to the transmission cooler? If over temp related, seems the ECU would pick up on that and throw an engine code? Under normal driving can’t figure the transmission getting all that hot? I read somewhere our engines have an electronic thermostat fully controlled by the ECU and not a conventional one that is heat controlled with no computer. Not sure if the transmission cooler lines and the engine coolant hoses all see the same temps and are tied together, or independently controlled somehow?

 

[joschneider]

This is what I keep worrying about. A lot of Stinger guys talk about having that same problem. Though some think it's normal and don't worry about it, but I don't think it's normal at all... Mine has never done anything like that before. If it does, I will be super bummed.

I checked my transmission cooler when I had my bumper off, and everything looked great. Gonna double check the hose connections on the tranny itself when I change my oil (hopefully tomorrow night).

You’ve never had it hard shift during a downshift? A feeling like it didn’t quite match rpms to be smooth and it results in a jerk as you’re braking or coasting down?

 

[Husky]

Luckily I have not ever felt that, at 10k miles, 3.3T, AWD. So far no complaints about the tranny. Fingers crossed.

 

[Husky]

You would think if the problems were related to tranny overheating, it would throw a code. Sounds like maybe the cooler is under sized?

 

[danygenesis]

I've felt a hard downshift more than a couple of times. It's more evident when coasting and I have to apply the brakes. Sometimes is on the contrary, when coasting at highway speeds and I suddenly need to apply the gas pedal the tranny jerks when upshifts. It's as if the tranny doesn't engage the correct speed for the actual RPM.