AWD Slipping ? Rear Slipping ? - Kia Forum

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post #1 of 164 (permalink) Old 07-06-2015, 07:26 AM Thread Starter
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AWD Slipping ? Rear Slipping ?

Wondering if anyone else has experienced this. I have a 2014 Sorento SX AWD ~18,000 miles. At a dead stop, if I turn the wheel approx. 1 full turn left or right and accelerate I get the feeling of going over a rumble strip as if the awd might be slipping or the rear is slipping. Occasionally I can duplicate the issue if I am going 10-15 mph and turning. Has anyone else experienced this and or know what this may be ? I don't recall it ever doing this before. I did take it to my Kia dealership and took a mechanic out to duplicate the issue, however he told me he would need to contact Kia to find out what to do..? Any help / thoughts are appreciated.

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post #2 of 164 (permalink) Old 07-06-2015, 08:38 AM
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I have been noticing the same thing, recently. To me, it feels similar to a vehicle with a locked rear diff that is binding around corners. I was wondering if maybe the center diff is sometimes engaging on its own, without hitting the button or causing the light on the dash to come on. I have yet to contact my dealer about it.
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post #3 of 164 (permalink) Old 07-06-2015, 08:46 AM Thread Starter
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Its almost like an old 4 wheel drive truck and you'd get out, lock the hubs (ha, like having to get up to change the channel on the tv, before remotes) and make a tight turn. Not quite as dramatic as that, but a similar feel. Almost like going over a short light duty rumble strip. I'm waiting to hear back from the dealer. I'll keep you posted if/when I hear anything.

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post #4 of 164 (permalink) Old 07-06-2015, 04:11 PM
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I'm guessing you didn't have the AWD locked in, Right?
Either way, AWD is always engaged at least 90/10 % on all these Kia, & Hyundai AWD vehicles.
If that means anything to you?

Some previous Hyundai/Kia vehicles: 2002 Santa Fe LX V6 AWD, 2005 Tucson LX V6 AWD, 2010 Tucson GLS 2.4L AWD, 2011 Sportage EX 2.4L AWD, 2015 Sorento Ex V6 AWD
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post #5 of 164 (permalink) Old 07-06-2015, 04:38 PM
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probably a combination of the ESC and AWD. the ESC brakes the wheel that is spinning/lost traction, and the AWD sends power to the rear wheels.

from the 2014 Sportage manual

Quote:
Tight corner brake effect
Tight corner brake effect is a unique characteristic of four-wheel drive vehicles caused by the difference in tire rotation at the four wheels and the zero-degree alignment of the front wheels and suspension.
Sharp turns at low speeds should be carried out with caution.


The Electronic Stability control (ESC) system is designed to stabilize the vehicle during cornering maneuvers. ESC checks where you are steering and where the vehicle is actually going. ESC applies the brakes on individual wheels and intervenes with the engine management system to stabilize the vehicle.

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post #6 of 164 (permalink) Old 07-06-2015, 04:45 PM
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https://www.kia-forums.com/general-ki...explained.html

the Dynamax AWD system is always on, but for fuel economy it will try to go 100% front wheels as much as possible.

Quote:
The computer algorithm for the clutch looks for consistently good front-end traction and when possible will maintain 100% to the front wheels for fuel economy. The algorithm, however, is adaptive; in "sporty driving" it will apportion torque as needed between front and rear, Sackl said, and it will transfer 100% to the rear if appropriate.

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post #7 of 164 (permalink) Old 07-07-2015, 09:12 AM
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We had the exact same symptoms with our 2014 EX. Dealer said the rear differential coupling was bad and had to be replaced. I don't know much about AWD parts but I knew based on the the way it was happening (turning from a stop and accelerating) I knew it had something to do with AWD. They replaced it and it is fixed....for now. Based on this thread though, I wonder how long until it "goes" again.
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post #8 of 164 (permalink) Old 07-09-2015, 02:39 PM
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Mines in the shop right now for this as I have been feeling this same issue for a long time. I have the 2014 SXL AWD. Since there is no code it requires the dealer to get approval from KIA to do anything before then can proceed. When I pull the 4WD fuse the problem goes away. Try that and see if notice the issue goes away.
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post #9 of 164 (permalink) Old 07-10-2015, 07:59 PM
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Haven't been on the forum since I got my 2014 SXL after having a 2011 SX. I have this problem exactly as described. Dealer replace upper and lower steering stuff as directed by the Kia Tech Line guys at the factory because the dealer techs had no clue what was wrong. Of course this did not fix it. That was 2 months ago. I decided to let it go for a while hoping it would get worse and it has. Without question this is the AWD system. This is my 9th AWD SUV and it is definitely like everyone has described. Turn right or left and it is like an old time 4X system in low range. I want to take it for repair after someone on the forum has theirs repaired successfully. I can then take the results and prove to my dealer what the fix is.

Please, anyone who gets theirs fixed, immediately let us know so we can get widespread problem into the Kia system for all dealers to be aware of. THANKS, Bill
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post #10 of 164 (permalink) Old 07-13-2015, 04:27 PM
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Did you have a chance to unplug the 4WD fuse and see if the problem exists any longer? Try unplugging and start back up and try. I did this and the problem is gone. The dealer is replacing the rear coupler because of this and should be complete this week.
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