The bizarre John Lyon quiz linked to in another thread today made me wonder. I've read about DD, as we shall call it here. I even found some discussion of it among some self-professed advanced drivers on another forum, which at least explained the principle of matching input and output speeds before re-engaging.
So, out of curiosity, I tried it out, on a familiar bit of road and in light traffic so all the left-foot faffing wouldn't get in anyone's way. And do you know what? I could find no discernible difference in the quality or smoothness of the gearchanges; they just took four times as long.
Now, I presume our own Mr Pillar has a use for this, but does anyone here ever do it with more recent machinery? Or is my instinct, that a certain type of pipe-smoking AD still does it because he can although there's no earthly use for it, closer to the mark?
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