Transmission slipping taking off from a complete stop?

Tiny
RONNY423
  • MEMBER
  • 2010 HYUNDAI ELANTRA
  • 4 CYL
  • AUTOMATIC
  • 187,000 MILES
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?
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Wednesday, August 24th, 2022 AT 6:32 PM

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Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,554 POSTS
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.
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Thursday, August 25th, 2022 AT 12:40 PM

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