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

Bulletin number

21-017-16 REV. A

Component

Electrical system: software

Summary

"flash: transmission shift and drivability enhancements this bulletin involves reprogramming the transmission control module (TCM) with the latest available software. Some customers may experience a malfunction indicator lamp (mil) illumination. Upon further investigation, a technician may find the following diagnostic trouble code (dtc) stored in the TCM memory: · p0731 - gear ratio error in 1st. The following enhancements are included in the software update: · 2-1 coast down improvement (3.0l only). · 3-2 coast down improvement (3.0l only). · improvement to 5-3 downshift with pedal to improve 5-3-2 shift (3.0l only) · 6-5 coast down improvement (3.0l only) · 2-3 upshift with less than 30% pedal improvement (3.0l only) · clutch c adaption stability improvement (improves shift quality for new transmissions on gear shifts that use clutch c) (3.0l only). · garage shift to d improvements (3.0l only). · rolling garage shift improvements (3.0l only). · implementation of end of line (eol) adaption to improve shift quality on brand new transmission. · diagnostics improvements (3.6l and 5.7l). · improve shift quality on brand new transmission (5.7l only). · improvement to first 1-2 shift after start (5.7l only). · improvement to 1-2 shift, especially for colder operating temperatures (5.7l only). · 2-3 shift feel improvement especially for colder operating temperatures (5.7l only). · coastdown shift improvements (6-5, 5-4, 4-3, 3-2, 2-1) (5.7l only). · coastdown shift feel refinement for double downshifts (5.7l only). · kickdown improvements for the following shifts (7-6-5-4-3, 8-6-5-4, 6-3-2, 5-3-2, 4-2) (5.7l only). · improvement to 4-2-1 (5.7l only). · improved 7th gear upshift timing. · downhill engine braking improvements."

Owners of these vehicles have filed 194 complaints in the electrical category.