when i drive my girlfriends car i coast to the red lights in gear (an automatic), it goes into DFCO relatively quickly, and when i see it's close to cutting the injectors back in i push the O/D button to force it down into 3rd, then down into second gear as it slows more, i can usually keep it in DFCO until i'm down around 20-25 MPH, and after a little practice i figured out how far away to start the process at different speeds.
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