Chug-wagon

While the “chug-wagon” business is good, it is not probable that farm wagons, trucks, etc., will assume a very heavy demand until harvest time.

Source: wiktionary

As they become more familiar with mechanical power thro the automobile and the small tractor, the chances are that farmers will utilize also the many advantages of the motor truck as fast as they can raise the price and see their way to keep the chug-wagons busy.

Source: wiktionary

Maybe it was just the spectre of a romance that doesn't exist in this age of chug-wagons, that have no whip to wrap the lines around, no bosky dells untainted by gasoline where the old mare would stop of her own accord and two hearts could lay their secrets bare and learn the meanings of life without saying a word.

Source: wiktionary