my customers 2009 ctsv autom. shifts on highway from 6 to 5 and i dont know why.
my customer like to drive up to 250km/h in 6 gear to save fuel but on light accererate 50% TPS the car shifts at 221km/h down in 5 gear. (see log file time 2:54)
not in Sport mode, shifter is on D.
there is no point in the tables compare with the shift. what shift speed table you mean? i never done anything on trans tabes.