Transmission control unit (TCU) gear shift logic improvement
Kia technical service bulletin TSB_TRA088 for 2018 Kia Optima.
- Bulletin number
- TSB_TRA088
- Component
- Power train
- Summary
- TECHNICAL SERVICE BULLETIN: TRANSMISSION CONTROL UNIT (TCU) GEAR SHIFT LOGIC IMPROVEMENT - This bulletin provides the procedure to improve the gear shift logic of the Transmission Control Unit (TCU) on some 2018MY Optima (JF, JFa) vehicles produced from April 18, 2017 through July 11, 2018, equipped with 2.0L T-GDI and 2.4L GDI engines, which may harsh downshifts (including 2-1 gear change).
Owners of these vehicles have filed 19 complaints in the transmission category.
Vehicles covered
- Kia Optima 2018 2018
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