Hyundai TSB #20-AT-010H
2020 Hyundai Sonata
Affected Component: POWER TRAIN:AUTOMATIC TRANSMISSION
- Hyundai approves only the ATF, DCT gear oil and IVT gear oil specified in the vehicleâs ownerâs manual. Use of other ATF may result in improper shift quality or other drivability conditions. Use of other DCT and IVT gear oil may result in reduced durability. Hyundai does not approve the use of any aftermarket ATF or gear oil additives.