I remember my 66' Nova with the GM Powerglide. The two speeds, "very slow" and "everything else" couldn't be complained about as the transmission was nearly bulletproof and it is still used in some drag cars. The transmission was pretty heavy (even with the newer aluminum case,) never locked up, and seemed to be slipping even when it wasn't. The powerglide was pretty good for its time. I'll take the Subaru CVT over the powerglide, no problem. Seems to work pretty well to me and I suspect it is pretty light compared to the old stuff.