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I am in desperate need of help and expertise. My 2013 Genesis Coupe has begun "hard shifting", only when upshifting. For example, if I go from 2nd to 3rd, its delayed and jerks hard into gear, furthermore from 4th to 5th, it does the same thing shifts "hard" into gear. The action is quite erratic. I believe the problem is a faulty shift solenoid?
All other gears are fine, so it leads me to believe it may not be mechanical.

Has anyone else had this problem?
Can it be the ECU?
Is it the shift solenoid?
 

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Cerma at

Do the following and it will be fixed, for good.

Do not deviate, do not cut corners, do not try and drain and fill it yourself. You will get it wrong.

1. Find a larger more competent Hyundai, or better yet, a new Genesis only dealer. (The reason is all the big Genesis sedans use the ZF pattern 8AT).
2. Purchase 7 qts of CERMA AT. Yes, its F--king magic.
3. Pay them the labor only rate to do your change. They will FULLY drain your TC. Something you cant do. Unless you have a pressure vacator/filler.
4. Enjoy your new transmission. Not only will your symptom immediately go away. Over time your trans will get better.

Dont believe me. Just ask M Kramer on this forum. He dilly dallied, tried his own way, then finally followed said advice, and VOILA ! His car was fixed. and you havent heard a peep from him since. LOL!:wink:
https://www.cermastore.com/transmission-fluid-automatic.html

Oh, you would be wise to get a trans cooler afterward too.
 

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Cerma at

Do the following and it will be fixed, for good.

Do not deviate, do not cut corners, do not try and drain and fill it yourself. You will get it wrong.

1. Find a larger more competent Hyundai, or better yet, a new Genesis only dealer. (The reason is all the big Genesis sedans use the ZF pattern 8AT).
2. Purchase 7 qts of CERMA AT. Yes, its F--king magic.
3. Pay them the labor only rate to do your change. They will FULLY drain your TC. Something you cant do. Unless you have a pressure vacator/filler.
4. Enjoy your new transmission. Not only will your symptom immediately go away. Over time your trans will get better.

Dont believe me. Just ask M Kramer on this forum. He dilly dallied, tried his own way, then finally followed said advice, and VOILA ! His car was fixed. and you havent heard a peep from him since. LOL!😉
Automobile Transmission Fluid - Cermastore.com

Oh, you would be wise to get a trans cooler afterward too.
Is this real?!
 

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Yes it is,..............

There have been a few 2013 plus 8ATs whichhave expressed drawn out issues with their trans. They exasperated themselves by trying all the "normal" options in fluids and treaments.

***When they finally tried what I have suggested, it corrected the problems,.........and were never heard from again.
(point is it fixed it, their forum participation was limtied to them trying to find a cure.)

I have a stock internal 3.8T which has a TCU tune, two consecutive ATF coolers, and dyno's at 475 whp. Yes 8AT. (9.5 psi).
PS the build has 22K on the turbo conversion. So none of this,.........oh the trans can only take 375 ish. Thats bull crap and I'm living proof. The caviat is:
1. CERMA ATF
2.Trans cooler with fans.

CERMA wont fix BROKE,...but it will correct everything else that ails a trans. Including hardened/heat damaged seals.
 

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The A8 Transmission in the 2013 Genesis coupe is the A8LR1

This might help below QUOTED HERE:

"A8LR1
Although the oil aging slightly worsens its qualities, after running 80-100 thousand kilometers (50k-60k miles) it is recommended to check it for transparency and change it together with the filter-pan, especially if the transmission operated at maximum loads.

One of the main soft spots causing problems in this transmission is the valve body with solenoids. This transmission is very sensitive to operation with contaminated oil under the condition of ultimate loads. Intensively operating VFS solenoids-electric-regulators are the first to reach the end of their lifespan."


Transtech Overhaul Kit 2683 is now available for the A8LR1 transmission.

Other solutions I’ve read others have had success with is a dealer TMC update to the 2014 TMC programming and adaptive learning reset. It seems that some have had success getting their dealer to do this update and others have not.

I’ve read excellent reviews about Ravenol SP-IV RR Automatic Transmission Fluid formulated for the Genesis Coupe.
 

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Its (Crrraaaaap ! Scottish accent). Standard industry garbage. Over priced Im sure.
CERMA ATF exceeds anything made, and will not oxidize to 800 F..

Plus I have two years on mine with my excessive whp.
Change the ATF at Hyundais severe duty usage,...(Tuned cars are severe). Every 60 K, and you will not have to do the re-build at 100-120k. I chnaged mine when I bought her with 19K, so the next change will be 79 to 80 K.Now if you are one who hasnt for 100K, oh well so be it.

Point is my car has more whp going through this trans than just about any I ve read on here with an 8AT. My transaxle s like one of the most favorite parts of this car, even more now with the crazy Tros booster.

So the choice is yours, stuff you may have read about, or proven stuff from a dude who has it and has remedied a few 8ATs. No rebuild kit needed.
I concurr with everything your quote asserted, the point is for that never to be the case. The way to avoid those conditions is to
1. Maintain flawlessly clean super synthetic fluid which can not oxidize or become acidic. Changed at a recommended interval.
2. The key indicator of everything in the aforementioned symptoms and causes is temperature.The cooler you can maintain your ATF is the way to stop all that in its tracks indefinitely

My fluid averages 98.6F, the hottest I have seen is 122F. That was a high speed bomb run exceeding speeds of 125 mph and boosting. multiple volleys of speed-up, trans brake included..

**The kit is pretty cool if you need it though,...............if you have the right guy to do the work.
**Hyundai trans tunes suck. They are slow, sluggish, and no TC lock up. A Korean savant did my Stuff.

*****Interesting how the majority of this kit are "seals". Heat causes seals to prematurley fail shrink/warp/brittle. The forte of CERMA ATF is its abilty to rejuvenate even heat damaged seals.
 

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I am in desperate need of help and expertise. My 2013 Genesis Coupe has begun "hard shifting", only when upshifting. For example, if I go from 2nd to 3rd, its delayed and jerks hard into gear, furthermore from 4th to 5th, it does the same thing shifts "hard" into gear. The action is quite erratic. I believe the problem is a faulty shift solenoid?
All other gears are fine, so it leads me to believe it may not be mechanical.

Has anyone else had this problem?
Can it be the ECU?
Is it the shift solenoid?
Did you end up fixing this because my '13 2.0 auto has the same problem. Hard shift from second to third gear and then fourth to fifth. It's been a couple years, did you find a solution?
 

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I am in desperate need of help and expertise. My 2013 Genesis Coupe has begun "hard shifting", only when upshifting. For example, if I go from 2nd to 3rd, its delayed and jerks hard into gear, furthermore from 4th to 5th, it does the same thing shifts "hard" into gear. The action is quite erratic. I believe the problem is a faulty shift solenoid?
All other gears are fine, so it leads me to believe it may not be mechanical.

Has anyone else had this problem?
Can it be the ECU?
Is it the shift solenoid?
Did you end up getting it fixed? If so what did you do?
 

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Did you find a solution? Mine keeps doing it and it’s getting very bad
Yeah man I did. I had to get the transmission replaced. I went to the dealer and they quoted me $7,000, so I said hell no and left lmao. I live in SoCal, and this performance shop I went to called Concept 3, and they hooked me up with a 12,000 mile transmission for $500 plus install and it came to about a little over 1K. Transmission works fine, shifting is great, no new problems with it! But you are gonna have to replace the tranny. I asked the dealer if it was in need of a replacement and they told me yes, and that the 8-speed automatics are common with needing replacements. That's Hyundai for ya
 

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Cerma at

Do the following and it will be fixed, for good.

Do not deviate, do not cut corners, do not try and drain and fill it yourself. You will get it wrong.

1. Find a larger more competent Hyundai, or better yet, a new Genesis only dealer. (The reason is all the big Genesis sedans use the ZF pattern 8AT).
2. Purchase 7 qts of CERMA AT. Yes, its F--king magic.
3. Pay them the labor only rate to do your change. They will FULLY drain your TC. Something you cant do. Unless you have a pressure vacator/filler.
4. Enjoy your new transmission. Not only will your symptom immediately go away. Over time your trans will get better.

Dont believe me. Just ask M Kramer on this forum. He dilly dallied, tried his own way, then finally followed said advice, and VOILA ! His car was fixed. and you havent heard a peep from him since. LOL!😉
Automobile Transmission Fluid - Cermastore.com

Oh, you would be wise to get a trans cooler afterward too.
My car has been shifting hard from second to third and fourth to fifth, I’m not sure if I should call hyundai and ask them if there needs to be a ecu update or if I should try the cerma.
 
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