Software determines whether it upshifts at the rev limiter. And that goes for manu-matics and DCT gearboxes.
I seem to remember driving a Lincoln LS on an autocross course a few years back and the manu-matic allowed you to bounce off the rev-limiter. It would not upshift until you instructed it to by slapping the gearlever. But, thank goodness, it wouldn't let you downshift past the red line. ; -)
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