Flash: Transmission Control Module (TCM) Updates
This bulletin involves reprogramming the TCM with the latest available software.
Customers may comment on one or more of the following: Harsh shifts. Poor shift quality, with light pedal.(Sales Codes ETM and ETN Only). Poor shift quality, 32-48 kph (20-30 mph), at low rpm with light to medium pedal apply, typically tipping in from zero pedal.(Sales Codes ETM and ETN Only). Coasting shift bump with exhaust brake and/or tow/haul active.(Sales Codes ETM and ETN Only). Poor shift quality, often when increasing pedal during a shift.(Sales Code ESB Only). Squawk/chirp/squeak type noise during a 3-4 upshift.(D2 Only). Poor 1-2 upshift quality.(D2 with ETM or DD/DP with Sales Code ESB Only).
