"Flash: transmission shift and drivability enhancements this bulletin involves reprogramming of the...

Bulletin number

21-019-16

Component

Power train: automatic transmission

Summary

"flash: transmission shift and drivability enhancements this bulletin involves reprogramming of the transmission control module (TCM) with the latest available software. A small number of customers may experience an erroneous malfunction indicator lamp (mil) illumination. Upon further investigation, the technician may find a diagnostic trouble code (dtc) stored in the TCM memory. 3.6l engine (sales code erb) with 845re transmission (sales code dfl): · improved shift quality. · p1dcd - TCM monitoring processor performance multiple clutches locked up. · p1b13 - park-by-wire unintended out of park position. · p0734 - gear 4 shift incorrect ratio. 3.6l engine (sales code erb) with 8hp45 transmission (sales code dfg): · improved shift quality. · harsh 2-1 downshift or bump at low speeds. · p0734 - gear 4 shift incorrect ratio. 3.0l engine (sales code ehd) with 845re transmission (sales code dfl): · improved shift quality. · p1dcd - TCM monitoring processor performance multiple clutches locked up. · p1b13 - park-by-wire unintended out of park position."

Owners of these vehicles have filed 85 complaints in the transmission category.