Chevrolet Power Shift original vintage advertisement. Why shift
for yourself? Own a Chevrolet with new exclusive vacuum power
shift! The only steering column gearshift that goes into action
automatically when you touch the lever to change gears. With
Chevrolet, gearshifting is 80% automatic, and only 20% driver
effort. See the new 1940 Chevrolet today. Eye it. Try it. And
you'll buy it.