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:
· P061B-00 - Internal Control Module Torque Calculation Performance.
· P072F-00 - Stuck In Gear 4.
The following enhancements are included in the software update:
· **7-8 gear increase shift at higher speed.
· 8-9 gear shift will happen on a downhill only.**
· Coast down bump on 7-6, 6-5, 5-4, 5-3 downshift improvements.
· Cold 1-2, 2-3 upshift improvements.
· 1-2, 2-3 upshift flare control improvements.
· Power-on upshift improvements.
· Lift Foot Upshift 2-3, 4-5, 8-9 improvements.
· Improve transmission shift enhancements for sand and snow mode.
· Vehicle performance enhancements.
