The Hydra-Matic, GM’s first fully automatic transmission, was a great success, inspiring a host of rivals — including some within General Motors itself. This week, we look at the origins of Dynaflow and Powerglide, the ambitious but ill-fated Turboglide and Triple Turbine, the later controlled coupling Hydra-Matic and Roto Hydramatic, and more.
Technology and Terminology
Explanations of various automotive terms and the technology under the hood.
The original Hydra-Matic transmission was one of the most important innovations in the history of the automobile. It wasn’t the first automatic transmission, but it was the first one that really worked and its resounding commercial success paved the for every subsequent autoshifter. This week, we take a look at the origins of the Hydra-Matic and its originator, Earl Thompson, who also developed the first synchromesh gearbox back in the 1920s.
A car’s weight has a dramatic effect on its performance, ride, handling, and fuel economy. Figuring out how much a car weighs should be simple, but the weights listed in brochures, road tests, and other sources can be contradictory and confusing. A vehicle’s specifications may list shipping weight, manufacturer’s curb weight, and gross vehicle weight ratings, all of which are quite different. To sort out this confusion, let’s look at what each of these terms means.
Periodically, we feel it’s worth taking the time to define some of the terms we throw around with which some readers may not be familiar. This week, we examine some of the terminology of automotive design.
One of the minor but contentious arguments among automotive enthusiasts and historians is the question of exactly what constitutes a muscle car. Since we’ll be talking about several cars of this breed in the coming weeks, we thought we’d give you our take on this issue.
Since we’ve been talking more about European cars this year, we have been making frequent references to “DIN” power ratings. We wanted to be sure everybody is clear on what that means.
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Another term we have thrown around a lot that bears some explanation is Hotchkiss drive. This is a suspension layout very common on front-engine/rear-drive cars and trucks from the 1920s until the late 1970s and still used on many pick-up trucks and SUVs. Click here to read more about it.
In some of our past and upcoming articles, we’ve been throwing around the word homologation, and it occurs that we should pause to explain what it means.
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Unlike its Mercury division, Ford Motor Company’s Lincoln brand was originally a separate company, founded in 1917 by Henry Martyn Leland, the founder of Cadillac. Henry Leland was one of the best and most respected engineers of the early auto industry, an expert in mass production and precision manufacturing. His life, however, is a tragic tale of broken promises and dashed hopes, the story of a great man brought down by the pettiness and venality of a new era that no longer had any place for great men. This week, we look at the career of Henry Leland, founder of Cadillac and Lincoln.
It’s one of the most common suspension designs used on modern cars, found on everything from the lowliest Proton Savvy to the formidable Porsche 911 Turbo. It’s also frequently misunderstood and often misspelled. This week, we will try to set the record straight about the origins and workings of the MacPherson strut suspension system.