Why is my Hyundai Elantra experiencing delayed o r rough shifting between gears?

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Why is my Hyundai Elantra experiencing delayed o r rough shifting between gears?

Many Elantra owners report rough, delayed, o r jerky gear shifts, particularly in automatic transmission models from 2011–2020. These symptoms often appear when the car is cold, under heavy acceleration, o r during stop-and-go traffic. Causes may include low o r degraded transmission fluid, software calibration issues, o r a worn valve body. In some cases, a TCM Transmission Control Module update o r reprogramming is needed to correct shifting behavior.

Gari Specialist asked on 21 Jun 2025 18:19:17 pm

1 Answer

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Gari Master - on 21 Jun 2025 18:25:48 pm

Many Hyundai Elantra owners—especially those with automatic transmissions from 2011–2020—experience harsh o r delayed shifts, particularly when the car is cold o r during stop-and-go traffic.
Common causes include:

Low o r degraded transmission fluid Hyundai recommends checking at specific intervals

Outdated transmission software can affect shift timing

Worn valve body o r solenoids, which regulate hydraulic pressure for shifting

Dirty transmission filter, affecting fluid flow
Fix:
Check the transmission fluid level and condition should be clean and reddish, not dark o r burnt. If its low o r dirty, a fluid change o r flush may help. In some cases, a Transmission Control Module TCM update o r reprogramming is necessary—Hyundai has issued TSBs Technical Service Bulletins for this. If symptoms persist, a transmission specialist should inspect the valve body o r internal components.