Holden vehicles fitted with Chevrolet V8 engines used the 1.76 ratio gear-set. One notable exception was the export version of the transmission, which offered only the 1.82 ratio and was used by Holden in Australia behind their Australian built 6-cylinder and V8 engines. Most of the V8/Powerglide transmissions came with the 1.76 gear set. With a 3.31 axle, Car and Driver magazine noted a full-throttle up shift speed of 76 mph (122 km/h) to direct with the 409-4bbl 340 hp (250 kW) engine in a contemporary road test. A heavy duty version of Aluminium Powerglide was offered for passenger cars equipped with the 409 cubic inch V8 engine, and Chevrolet light trucks using a 1.76:1 reduction planetary gear set, instead of the usual 1.82:1. In 1962, GM started building Air Cooled Powerglides in aluminium, primarily for use in the new model Chevy II, which required a lightweight transmission for its compact body, and discontinued the cast iron Powerglides in 1963. By the mid-1950s, more than half of all new Chevrolets were sold with Powerglide. The 1953 and later units when in "Drive" started in low and automatically up shifted to high at a speed determined by the throttle opening. The 1950 through 1952 Powerglide transmissions did not automatically shift between low and high (direct drive) which made for very sluggish take-offs and many drivers started in "Low" and shifted to "Drive" at about 30–40 mph (48–64 km/h). ![]() The transmission was simple and very durable, which satisfied customers. When introduced on upper-level Chevrolet models in 1950, the Powerglide represented the first automatic transmission offered in a low-priced automobile in contrast, Ford did not offer their automatic transmission until 1951, while Plymouth car buyers had to wait until 1954. They were also used with Nova engines in the DJ-5A Jeeps produced 1968-1970 by Kaiser-Jeep and widely used as delivery vehicles by the United States Post Office. Powerglides were used extensively on Pontiacs produced for the Canadian market with Chevrolet powertrains. It was available primarily on Chevrolet from January 1950 through 1973, although some Pontiac models also used this automatic transmission after the fire at the Hydra-Matic factory in 1953. The Powerglide is a two-speed automatic transmission designed by General Motors.
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