Certain Hyundai, Kia, and Genesis trims equipped with ZF 8‑ and 9‑speed transmissions have been subject to complaints of harsh shifts, gear hunting, and delayed engagement. Issues were less uniform than engine defects but notable in specific trims. Remedies included software calibration updates and limited component replacements. Class actions and recalls have referenced these transmission defects.
| Year(s) | Make | Model | Should Purchase? | Notes | |
|---|---|---|---|---|---|
| 2017 2018 2019 | Genesis | G80 (3.8) | Awareness |
Transmission: ZF 8‑Speed Automatic – 8HP50 Issues: harsh shifts, gear hunting, delayed engagement Remedy: software calibration updates, limited component replacements Legal context: referenced in class action filings and TSBs |
|
| 2017 2018 2019 | Genesis | G90 (5.0) | Awareness |
Transmission: ZF 8‑Speed Automatic – 8HP90 Issues: delayed engagement, harsh shifts under load Remedy: software updates, limited component replacements Legal context: referenced in consumer complaints and settlement discussions |
|
| 2019 2020 | Hyundai | Santa Fe (V6) | Awareness |
Transmission: ZF 9‑Speed Automatic – 9HP48 Issues: gear hunting, harsh shifts, limp‑mode events Remedy: calibration updates, limited component replacements Legal context: recall advisories and class action references |
|
| 2019 2020 | Kia | Sorento (V6) | Awareness |
Transmission: ZF 9‑Speed Automatic – 9HP48 Issues: delayed engagement, harsh shifts Remedy: software updates, warranty extensions in some cases Legal context: referenced in settlement filings and TSBs |