Flash: Transmission Diagnostic and Shift Enhancements
This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software.
Customers may experience a less than desirable down shift during one or more of the following:3-2 coast-down shift.
2-1 coast-down shift.
6-5 coast-down shift.
The following software enhancement is available for(6.4L Only):Reduce bumps felt on light to medium decel braking while coming to a stop. Bump could be described as a push, driveline clunk, or
engine flare noise right after the 5-4 downshift. The vehicle speed may vary based on the rate of deceleration.
