Flash: Transmission Shift And Drivability Enhancements This bulletin involves selectively erasing and...

Bulletin number

21-005-15

Component

Power train

Summary

Flash: Transmission Shift And Drivability Enhancements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) and Transmission Control Module (TCM) with new software. NOTE: Both the PCM and TCM must be up to date for these changes to be effective. A small number of customers may experience one or more of the following conditions. ? Will not reach max speed (over 256 kph) during freeway driving. (International Market Only) ? Less than desired upshift quality in Normal or Sport mode ? Shift inhibit while transitioning in/out of MDS mode ? Less than desired downshift quality while coasting with the brake released or while passing. ? Vehicle will not display 2nd gear when entering Manual mode from Snow or ECO mode ? High speed gear hunting (shifting back/forth repeatedly between two gears) ? Will not exceed 20 mph in reverse. ? Less than desired 2nd gear launch quality while in ECO mode ? Unable to launch in 3rd gear in Snow mode in higher altitudes. ? Less than desired shift quality during accelerator pedal tip in/out acceleration during Torque Converter Clutch operation.

Owners of these vehicles have filed 476 complaints in the transmission category.