In message m, Martin
Underwood writes

I know about diesel-electric and diesel-hydraulic transmission on
locomotives, but I imagine that the size and weight of these types of
transmission make them rather impractical for use in a car.
If you know these things then you'll know that a car auto transmission
is just a cut down locomotive hydraulic transmission. Further you
don't need to heat fuel all the time you are stationary, just before you
need to start up in the morning.
--
Clive