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Hyundai TSB #23-AT-011H
2023 Hyundai Sonata
TSB Document:
Affected Component: POWER TRAIN
- Summary
- This bulletin outlines changes to the service procedure regarding the replacement of 8-speed wet dual clutch transmissions (8WDCT) and associated transmission control unit (TCU). These changes only apply to vehicles equipped with Theta 2.5T engines. Certain transmissions (indicated by a new part number) have received an improved clutch spring. The correct TCU software update must be matched with the correct corresponding 8WDCT hardware, otherwise drivability concerns may occur.
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