Some people might suggest that with a driver in your hands, it's a different swing. I'll go further than that ... I think it's a different sport.
I've been flailing away with the b.... thing for decades and I'm convinced even my "good'' drives are bad shots. The ones that work are pure random, halfway between my slice and hook.
Being a swing tragic, I've got one hundred different off-the-tee keys, 99 of which I quite regularly take to the golf course. There is one, however, that's reserved for the practice range. Here ... on some occasions ... something happens (at the top?) (in transition?). It's an awkward left hand/wrist/forearm sensation that sometimes feels like the handle is rotating in my left palm; almost like I'm re-gripping the thing. As alien as it feels ... and it seems to contradict every piece of instruction I've ever gleaned ... as soon as I feel it there's no need to even look where that ball goes. I know it's string-straight, medium height, down-the-line 225m plus.
Obviously, as soon as I try to consciously emulate the sensation I'm a dead duck but I'm positive if I can ever get a handle on it my score will improve by about a score.
The impossible dream ... makes life worth living, huh?
cheers Bob