Transmission jerks when shifting from second gear to third gear over 2,000 RPMs

Tiny
KELLI LYNN PRESTRIDGE
  • MEMBER
  • 2005 HYUNDAI SANTA FE
  • 3.5L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Jerks when shifting from second to third over 2,000 RPMs but under 2,000 RPMs it shifts good.
Tuesday, November 16th, 2021 AT 10:19 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,740 POSTS
Hi,

First, is the transmission fluid clean and full? If you haven't checked, follow the directions below and let me know the results. (See pics 1-4)

Transmissions depend on what is called line pressure and shift solenoids to function. What you described at first sounded like a pressure issue, but I need to know if this is the only shift it happens during.

As far as testing, what really should be done is this. First, scan the can-bus system. CAN stands for controller area network. Basically, all computers/modules are tied together via a few wires. With this type of scan, trouble codes can be retrieved regardless of the module storing them. Here is a quick video showing how it's done:

https://youtu.be/InIlnsjOVFA

The other way to test for a harsh upshift is by driving the vehicle with a live data scanner and watching shift commands from the PCM/TCM (power/transmission control module).

I realize these are things that may be difficult for you to do, so let me know what I can do to help. Also, here is a link you may find of interest:

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

Let me know what you find or if you have other questions.

Take care,

Joe

See pics below.

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Wednesday, November 17th, 2021 AT 8:20 PM
Tiny
KELLI LYNN PRESTRIDGE
  • MEMBER
  • 2 POSTS
Did you get my eply?
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Friday, November 19th, 2021 AT 10:12 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,740 POSTS
Hi, Kelli.

I didn't receive anything. Did you attach it to this thread?

Joe
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Friday, November 19th, 2021 AT 10:22 PM

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