If you’re familiar with transmissions like the Chrysler TorqueFlite and GM Turbo Hydra-Matic (among others), you may have heard of the “Simpson gearset.” In this installment of Ate Up With Motor, we look at the origins and function of the Simpson gearset and briefly introduce you to its inventor, the late Howard W. Simpson. Continue Reading Secrets of the Simpson Gearset
Fluid clutches — fluid couplings and torque converters — have many advantages for automotive transmissions, but with those benefits comes a cost: fuel-wasting hydraulic slippage even at cruising speed. Since the 1940s, automakers have come up with a variety of strategies for reducing or eliminating that slip, including series parallel “split torque” transmissions and different types of converter lockup clutches. In this installment of Ate Up With Motor, we take a look at how GM, Ford, Chrysler, Packard, and Studebaker have approached this slippery problem from 1949 through the late eighties. Continue Reading Giving Slip the Slip: Lockup Torque Converters and Split Torque Automatic Transmissions
Although frequently misunderstood and often misspelled, MacPherson struts are one of the most common suspension systems used on modern cars, found on everything from the Proton Savvy to the most formidable Porsche 911 Turbo. In this newly revised and updated installment of Ate Up With Motor, we’ll take a look at the origins and workings of the MacPherson strut, including modern variations like the Toyota Super Strut, GM HiPer Strut, and Ford RevoKnuckle. Continue Reading The MacPherson Strut
The Hydra-Matic, GM’s first fully automatic transmission, was a great success, inspiring a host of rivals — including some within General Motors itself. In this installment of Ate Up With Motor, we look at the origins of Dynaflow and Powerglide, the ambitious but ill-fated Turboglide and Flight Pitch Dynaflow (a.k.a. Triple Turbine), the later Controlled Coupling Hydra-Matic and Roto Hydra-Matic, and more.
AUTHOR’S NOTE: This article, originally written in 2010, has been extensively revised and expanded for 2016.
GM’s 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 auto-shifter. This week, we take a look at the origins of the Hydra-Matic and its originator, Earl Thompson, who also developed the first Synchro-Mesh 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.
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. In this installment of Ate Up With Motor, we’ll look at in more detail. Continue Reading Hotchkiss Drive
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. Continue Reading The 19th Century Man: The Rise and Fall of Henry Martyn Leland
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