6l90 - Trans shift mode question
I wanted to adjust the trans to use different shift points in sport mode. I went on the VCM scanner/transmission shift mode to determine which mode the computer is using in sport. Pattern A or pattern B. Normal drive shows as normal like it should. However when I go over to sport mode it still shows as normal? TUTD shows on the scanner but sport shows as normal. What am I missing? Currently normal, pattern A and pattern B all use the same shift parameters. Is that the problem?
Car is a 2009 CTS V. Any advice would be greatly appreciated.