Differential issue

[NewStingerScorpionOwner]

Finally - the rear differential was replaced. I picked it up on Tuesday and drove it with the shop foreman and it was smooth.

Wednesday and today I am driving and the problem is back.

I give up.

 

[MerlintheMad]

^^^Not just yet. Try that sequence suggested in the other jerky tranny threads: without looking I don't recall the sequence: but unless the transmission is defective, that always works. Then try driving in Smart mode to let the logic "learn" your driving style.

(edit: Sorry, I was not reading for comprehension and mixed this up with the jerky tranny issue thread(s). But I would still try it anyway: what can it hurt? And stranger things have happened: sort of like using the wrong tool for the right job.)

 

[G70LEbyAdoom]

^^^Not just yet. Try that sequence suggested in the other jerky tranny threads: without looking I don't recall the sequence: but unless the transmission is defective, that always works. Then try driving in Smart mode to let the logic "learn" your driving style.

at this point, try whatever this is, and if it doesn't work, either tell kia canada to replace the entire car or take it back and get something else, cuz what you have been through is ridiculous.

 

[Maljey]

Finally - the rear differential was replaced. I picked it up on Tuesday and drove it with the shop foreman and it was smooth.

Wednesday and today I am driving and the problem is back.

I give up.

Uggghhhh does Canada have lemon laws? Cause it seems like your heading there. Sorry bro.

 

[D.J.]

at this point, try whatever this is, and if it doesn't work, either tell kia canada to replace the entire car or take it back and get something else, cuz what you have been through is ridiculous.

I would bet just about anything... That suggestion gets laughed out of the phone call at Kia Canada.

Replace the car ..Not gonna happen .

 

[D.J.]

Finally - the rear differential was replaced. I picked it up on Tuesday and drove it with the shop foreman and it was smooth.

Wednesday and today I am driving and the problem is back.

I give up.

So a new differential didn't fix it...
Are you sure it isn't just the nature of how LSDs work when turning under load?


Is there any way to capture the issue on a video?

such a strange and rare problem.

 

[ht_addict]

Finally - the rear differential was replaced. I picked it up on Tuesday and drove it with the shop foreman and it was smooth.

Wednesday and today I am driving and the problem is back.

I give up.

When you drove the other stinger did it have winter tires, what was the weather conditions?
When you picked it up what was the weather like(outside temp, snow, wet???)
What is the temp and conditions at time of issue happening again?
What mode are you driving in?
Are you still on the Michelin PS4's?

I'm no mechanic but I think your issue and it has been mentioned before is the fact your running summer performance tires in the winter. As the temp drops, even on dry pavement these things will become "slippery than whale shit on an ice flow" As you turn the rear is going to slide, your traction control/LSD will kick in and remove power from the rear till they grip again. I think what your feeling is how the system is suppose to work, especially since your using Michelin PS4s in the Winter.

 

[NewStingerScorpionOwner]

^^^Not just yet. Try that sequence suggested in the other jerky tranny threads: without looking I don't recall the sequence: but unless the transmission is defective, that always works. Then try driving in Smart mode to let the logic "learn" your driving style.

(edit: Sorry, I was not reading for comprehension and mixed this up with the jerky tranny issue thread(s). But I would still try it anyway: what can it hurt? And stranger things have happened: sort of like using the wrong tool for the right job.)

I will try this because it is very possible that this is indeed a jerky tranny issue. It was my dealership who concluded that it was the differential but who knows if they were right. I don't know why it would be ok for a day when I picked it up and then start again but who knows. At this point what does it hurt.

I will search for the thread to see exactly what was done.

 

[NewStingerScorpionOwner]

So a new differential didn't fix it...
Are you sure it isn't just the nature of how LSDs work when turning under load?


Is there any way to capture the issue on a video?

such a strange and rare problem.

I have tried capturing it on video but it is very hard to truly get it.

I can't imagine this is just how it works. It happens the most when I am making slow turns from stop signs on residential streets. It is better when I am making a turn while already driving.

Just yesterday I was making a left from a side street and the nature of the street is you need to catch your space and quickly dart out. So I do that, and right when I turn left, the power just stops for a second. As if I just took my foot off the gas. Meanwhile the car coming in the lane I was about to enter must be thinking what the hell is this guy doing - if you are gonna go then go. This happens often enough that I can't even drive properly because I am always anticipating it.

 

[D.J.]

I have tried capturing it on video but it is very hard to truly get it.

I can't imagine this is just how it works. It happens the most when I am making slow turns from stop signs on residential streets. It is better when I am making a turn while already driving.

Just yesterday I was making a left from a side street and the nature of the street is you need to catch your space and quickly dart out. So I do that, and right when I turn left, the power just stops for a second. As if I just took my foot off the gas. Meanwhile the car coming in the lane I was about to enter must be thinking what the hell is this guy doing - if you are gonna go then go. This happens often enough that I can't even drive properly because I am always anticipating it.

On that same street, if you disable traction AND stability control - does the problem go away?

 

[NewStingerScorpionOwner]

When you drove the other stinger did it have winter tires, what was the weather conditions? The other Stinger was on winter tires (and my dealer was upset about it because he told them not to so we can replicate the exact same situation). The weather was dry though.
When you picked it up what was the weather like(outside temp, snow, wet???) When I picked it up it was dry and probably around 6 degrees Celsius.
What is the temp and conditions at time of issue happening again? I have driven it in similar temperature since then while dry, and now also while wet but still in the 5-7 degree range. the problem is the most prevalent when I am making slow turns - like from a stop sign. Three point turns are laughably bad also.
What mode are you driving in? I am generally in comfort but I switched it to Sport also to see. I also tried turning off the traction control to see if it would change anything (I am not sure why but figured I would try stuff).
Are you still on the Michelin PS4's? Yep. I will definitely be on snow tires for next season, and early like November. But it was not worth it for this year anymore, plus I did not know if I would still have a Stinger since everything is up in the air with the car and how it will be resolved.

I'm no mechanic but I think your issue and it has been mentioned before is the fact your running summer performance tires in the winter. As the temp drops, even on dry pavement these things will become "slippery than whale shit on an ice flow" As you turn the rear is going to slide, your traction control/LSD (Limited Slip Differential) will kick in and remove power from the rear till they grip again. I think what your feeling is how the system is suppose to work, especially since your using Michelin PS4s in the Winter. This does sound reasonable to me but the thing that doesn't make sense to me is why it is the worst when I am going slower. So on a day where it is 7 Celsius and dry, I should not have any issue (in my completely unprofessional opinion) making a slow turn even on the summers. But I might be completely wrong.

Answers in italics above:

 

[NewStingerScorpionOwner]

On that same street, if you disable traction AND stability control - does the problem go away?

I don't think I have tried disabling the stability control but I will do that next time I get in my car for sure.

 

[vipeboy2000]

Did you ever swap the tires to a good all season or other tire for the cooler temps? obviously it is warming up now so tires shouldn't come into play as much... edit just saw your response

secondly, this to me sounds like it could be a defective wheel speed sensor (or some sensor relating to traction/stability most likely a wheel speed sensor) where the sensor is sending erroneous data making the car think a tire is slipping more than it is causing traction to kick in and kill the power far more dramatically. However, if you are accelerating normally and the back end is slipping/sliding swinging out on regular turns, then something is off, either defective tires/ LSD like they think it is, /or really messed up alignment/damaged suspension. On our AWD with michelin pilot sport All Season 4 tires, even in the cold and wet i can pretty much floor it out of corners/intersections and only then will the tail end step out some, coming from a RWD bmw, this car feels like you can drive it like in the dry when in the wet and cold with the awd and good tires.

 

[NewStingerScorpionOwner]

Did you ever swap the tires to a good all season or other tire for the cooler temps? obviously it is warming up now so tires shouldn't come into play as much... edit just saw your response

secondly, this to me sounds like it could be a defective wheel speed sensor (or some sensor relating to traction/stability most likely a wheel speed sensor) where the sensor is sending erroneous data making the car think a tire is slipping more than it is causing traction to kick in and kill the power far more dramatically. However, if you are accelerating normally and the back end is slipping/sliding swinging out on regular turns, then something is off, either defective tires/ LSD (Limited Slip Differential) like they think it is, /or really messed up alignment/damaged suspension. On our AWD with michelin pilot sport All Season 4 tires, even in the cold and wet i can pretty much floor it out of corners/intersections and only then will the tail end step out some, coming from a RWD bmw, this car feels like you can drive it like in the dry when in the wet and cold with the awd and good tires.

The back end doesn't really slip out though. It is more of a shudder. My wife described it as the jolting when you are on a roller coaster and it is starting its ascent up. I thought she did a good job describing it. In addition to that, sometimes there is just a break in any power for a second or two like what happened yesterday in my story above.

 

[NewStingerScorpionOwner]

When you drove the other stinger did it have winter tires, what was the weather conditions?
When you picked it up what was the weather like(outside temp, snow, wet???)
What is the temp and conditions at time of issue happening again?
What mode are you driving in?
Are you still on the Michelin PS4's?

I'm no mechanic but I think your issue and it has been mentioned before is the fact your running summer performance tires in the winter. As the temp drops, even on dry pavement these things will become "slippery than whale shit on an ice flow" As you turn the rear is going to slide, your traction control/LSD (Limited Slip Differential) will kick in and remove power from the rear till they grip again. I think what your feeling is how the system is suppose to work, especially since your using Michelin PS4s in the Winter.

I have been thinking about why it would happen more significantly when making slow turns from a stop as opposed to when I am already driving. I wonder if it is because since I am at a stop I do not have traction yet at all, but when I am already moving, the traction has been established? I don't know - I am reaching here but maybe something will land.

 

[D.J.]

The back end doesn't really slip out though. It is more of a shudder. My wife described it as the jolting when you are on a roller coaster and it is starting its ascent up. I thought she did a good job describing it. In addition to that, sometimes there is just a break in any power for a second or two like what happened yesterday in my story above.

Sort of like describing how an LSD works when cornering and accelerating?

 

[D.J.]

I have been thinking about why it would happen more significantly when making slow turns from a stop as opposed to when I am already driving. I wonder if it is because since I am at a stop I do not have traction yet at all, but when I am already moving, the traction has been established? I don't know - I am reaching here but maybe something will land.

Steering angle.

Greater steering angle

 

[ht_addict]

Answers in italics above:

I would suggest you go back to your dealer and ask them to put on the winter tires from the other Stinger and try it out. That is your problem. At low temps your tires will have no or minimal traction even on dry pavement. From a stop trying to push forward a heavy car that the Stinger is will be the cause of your slipping. The Michelin's need to be warned up to perform at there best, and that's in warmer months.

 

[D.J.]

I would suggest you go back to your dealer and ask them to put on the winter tires from the other Stinger and try it out. That is your problem. At low temps your tires will have no or minimal traction even on dry pavement. From a stop trying to push forward a heavy car WHILE TURNING WITH AN LSD that the Stinger is will be the cause of your slipping. The Michelin's need to be warned up to perform at there best, and that's in warmer months.

Added a WHILE TURNING WITH AN LSD.

This thread just reads to me as - normal behavior

 

[NewStingerScorpionOwner]

I would suggest you go back to your dealer and ask them to put on the winter tires from the other Stinger and try it out. That is your problem. At low temps your tires will have no or minimal traction even on dry pavement. From a stop trying to push forward a heavy car that the Stinger is will be the cause of your slipping. The Michelin's need to be warned up to perform at there best, and that's in warmer months.

I emailed them to see if they have winters or all seasons that they can try out. Man, if the problem was as simple as that I would be elated. But really I would think the trained professionals at the dealership would point that out. It makes me think they do not realize what tires I am on.