TSB: TRANSMISSION LOGIC IMPROVEMENT - This bulletin provides the procedure to optimize the logic of the Transmission Control Unit (TCU) on 2017-2018MY Soul (PS) and Forte (YDm) and 2016-2018MY Optima (JFa) vehicles equipped with 1.6T GDI that have one of the following three components replaced: Dual Clutch Transmission (DCT) assembly; Transmission Control Unit (TCU), and Double Clutch Set.The friction material of the double clutch set has been changed and a TCU logic optimization must be performed in order to prevent initial shift shock.
