What are some of the DFCO Paremeters referring to? M6? Manual Trans? Looks like all mine are off...

Although my {B3314} is all set to 15KMH I never get any DFCO till after 40 MPH and if in DFCO it disables at 40 MPH? Maybe I have a VSS setting off? Although all stock and auto trans maybe something in M6 is preventing any DFCO below 40 MPH?