Kia Troubleshooting Questions? Ask a Mechanic
Hello, I'm Brandon - Kia tech.
When was the last time the transmission fluid was changed?
Also is the check engine light ON?
Yes, you have to change out the Transmission fluid every 60k miles at least.
You must use Kia transmission fluid. You will need at 4 quarts.
The new fluid will help reduce the shuddering.
Please rate me positive, thank you.