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My 2016 Hyundai Santa Fe SE Premium has an intermittent hard upshift from 1st to 2nd gear. Each hard upshift the transmission seems to slip for a moment then jolts the car, one time spinning the rear wheels. It will go 20+ trips with no issue. Every ~20 trips, on cold start, it will jolt the first time it shifts from first to second gear, no issue for the rest of the trip. Twice in ~80 trips it has jolted every time it shifts from first to second gear for the duration of the entire trip regardless of auto/sport mode or eco on/off.

I recorded/uploaded video of a trip where it jolted every 1-2 upshift:
For each jolt, you can hear a "thud" and see the camera shake. Hyperlinks are available in the video description to quickly jump to each hardshift occurance.

Any ideas @AUTOSPARK @sbr711 ???

I have a Hyundai service appointment Wednesday 9/18. At 50K miles I am expecting this to be covered under powertrain warranty. We will see what they say.

Kind regards.
 

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Similar thing (hard shifting) occured on my 13 SFS 2.0t.
Vehicle was under warranty and tranny temp sensor was replaced. Service tech had to be certain so I left it overnight se he can see it himself on a cold start.
 

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Rescheduled service appointment to 9/25 due other obligations. I plan to recommend the following to the Hyundai service center.

Connect a GDS and check for DTC. Compare with MC 19-AT-012H
https://static.nhtsa.gov/odi/tsbs/2019/MC-10163279-9999.pdf

Use GDS to measure shift engagement time per MC 18-AT-004
https://static.nhtsa.gov/odi/tsbs/2018/MC-10138240-9999.pdf

If no DTC, replace solenoid valve per MC 19-AT-009H
https://static.nhtsa.gov/odi/tsbs/2019/MC-10160103-9999.pdf

If transmission replacement is deemed necessary

Check torque converter depth prior to installation per MC 17-AT-007
https://static.nhtsa.gov/odi/tsbs/2017/MC-10123305-9999.pdf

Check ATF level after installation per MC 16-AT-004
https://static.nhtsa.gov/odi/tsbs/2016/SB-10081115-0699.pdf

RESET (ERASE) AND RELEARN THE PCM/TCM ADAPTIVE VALUES per MC 16-AT-001-2
https://static.nhtsa.gov/odi/tsbs/2016/SB-10082455-0699.pdf
 

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Similar on mine too. Although mine never made a thud noise 😬 Cold start rough shift 1 to 2. Slippage was on 3 to 4 during a heavier acceleration. Dealer said they couldn't reproduce it so they reset the TCU to relearn and the slippage seems to be gone but the cold start rough shifting is still there.

I'm looking to using aftermarket transmission fluid soon - had good results doing it on the 09 Sonata.
 

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My 2016 Santa Fe Limited was doing the same thing. After the 3rd trip to the dealership, some kind of switch replacement that I had to pay for (because I was at 65,000 miles), they had my car for 3 weeks. I love my dealership. They were determined. I ended up with a new transmission. Now my air bag light is on
441997
 
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