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Giving Slip the Slip: Lockup Torque Converters and Split Torque Automatic...
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....
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Hydra-Matic History: GM’s First Automatic Transmission
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...
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Dynaflow, Turboglide, Roto Hydra-Matic, and Other Early GM Automatics
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...
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A Hydra-Matic Update
I have spent a lot of time over the past few weeks undertaking an extensive update of the 2010 article on the original GM Hydra-Matic transmission. The goal was to clear up various errors and points of...
View ArticleHydra-Matic Erratum
I discovered earlier that in the recent update of the Hydra-Matic article, I had made an embarrassing error in the description of the 1937–1939 Automatic Safety Transmission. The error is now...
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