TSB: 2016 ? 2019 model year RX350 and RX350L vehicles may exhibit one or both of the following conditions: ? A bucking feeling (back and forth jerking that comes right after a shift but then dissipates quickly after 1 ? 2 and/or 2 ? 3 upshifts) ? A surge feeling (back and forth rocking that is not associated with transmission shifts) when the vehicle is traveling between 0 ? 46 mph, transmission is in 3rd ? 8th gear, and torque converter is in full lock-up The Engine Control Module/ECM (SAE Term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of these conditions. Follow the Repair Procedure in this bulletin to address these conditions.
