Transmission slipping taking off from a complete stop?

2010 HYUNDAI ELANTRA
187,000 MILES • 4 CYL • AUTOMATIC
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RONNY423
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When I'm taking off from being fully stopped and get to about 20 MPH, my car revs up loud and you can't give it any gas. I have to let up and it will kick back into gear, and I can gas it again. so, I'm finding myself having to gas it a lot when I'm starting off. Do you know what my problem is?
Aug 24, 2022 at 6:32 PM
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STRAILER
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I would start by checking the transmission fluid. Here is how in the images below. Also, I have included a guide for you to go over to help see what's going on.

https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid

and

https://www.2carpros.com/articles/automatic-transmission-problems

Check out the images below to show you how to check the fluid level of your transmission.

Fluid Types

Automatic Transaxle Fluid

Type .................... Hyundai Genuine ATF SP-III, Diamond ATF SP-III, SK ATF SP-III or other brands meeting the SP-III specification approved by Hyundai Motor Co.
Capacities

Automatic Transaxle Fluid

Capacity .................... 6.97 qt (6.6L)

I have also seen the input shaft speed sensor cause this issue as well. Check out the diagrams (Below). Please let us know what you find. Check #36 on the last image to see the fluid dipstick.
Images (Click to enlarge)
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Aug 25, 2022 at 12:40 PM