Flash: 854RE Transmission Shift Enhancements
This bulletin involves reprogramming the Transmission Control Module (TCM) with the
latest available software.
A small number of customers may experience one or more of the following
Symptom/Condition(s) and/or a Malfunction Indicator Lamp (MIL) due to an erroneous
Diagnostic Trouble Code (DTC):
? P1DCD - TCM monitoring processor performance multiple clutches locked up.
? P1B13 - Park-By-Wire unintended out of park position.
? P0734 - Gear 4 Shift Incorrect Ratio set in the TCM memory.
? Bump sensation felt during engine start/stop transition on light throttle acceleration
(Engine Stop Start (ESS) equipped vehicles only).
? Less than desired overall downshifts during normal driving.
? Less than desired downshifts during passing maneuvers.
? Less than desired upshift quality in lower gears.
