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A Fuel Efficient Automatic Four-Speed Transmission for Light Trucks
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 01, 1981 by SAE International in United States
Annotation ability available
One phase of the broad General Motors program to improve fuel economy has been the design of an integral 4-speed automatic transmission that improves mileage in light trucks. This new overdrive unit features wide ratio gearing with 4-speeds and reverse from 2 planetary gear sets, a cpnverterclutch assembly, a variable capacity oil pump and extensive use of aluminum. Unique construction of several components produces a compact transmission that weighs only two pounds more than the 3-speed unit it replaces.