Truck automatic transmission (currently three manufacturers are producing automatic transmission for trucks over 10,000 lb. gvw) has been found to be an asset in vehicle economy. Fuel consumption has been found to be equal to or better than units with standard transmissions and driver acceptance is high. Unlike the case of the automobile where the controls of automatic transmission are primarily involved in getting to and maintaining top gear with relatively little effect on fuel economy, with the low power-to-weight ratio of trucks, the automatic transmission is required to shift more frequently and more precisely to meet the high road load horsepower requirements. Included in the programming of these shifts in the truck automatic is the gear selection to satisfy the vehicle load requirements at maximum fuel economy and with extended engine life. Two test drives are described and the advantages of truck automatic transmission from a drivers point of view are detailed. The smoothness in the shifting of gears reduces shock on the engine and drive line. The ruggedness of the transmission has been amply demonstrated.

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  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  United States  10036
  • Publication Date: 1974-11

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Filing Info

  • Accession Number: 00083012
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 26 1975 12:00AM