Fifteen fluid formulations were evaluated in 30 city buses operated in normal service for more than 2,000,000 mi; it was determined that fluids fail because of frictional deterioration and oxidation; two fluids were found to be satisfactory for more than 40,000 mi; one additional fluid was satisfactory for more than 30,000 mi, remaining 12 fluids failed in less than 20,000 mi; it is concluded that with properly formulated fluids, drain intervals in city bus automatic transmissions can be as great as 40,000 mi; however, drain intervals should be established by evaluating fluids in bus service for which they are intended; analysis of fluid samples taken during test can aid in establishing optimum drain interval.


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    Title :

    2,000,000 miles of fluid evaluation in city bus automatic transmissions


    Additional title:

    SAE -- Paper


    Contributors:

    Conference:

    SAE Meeting ; 1967 Transmissions



    Publication date :

    1967


    Size :

    11 pages


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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