A GL-5 gear lubricant containing a dispersed solid borate additive and a CD synthetic engine lubricant were evaluated in the overdrive transmissions of 17 new Class 8 trucks in a 500000-mile per truck, on-highway field test. With 500000-mile oil drain intervals, both lubricants gave acceptable performance as judged by end-of-test inspections: deposit/sludge formation was minimal, overall wear was low, and seal/yoke performance was good. The borate lubricant have a statistically significant lower wear rate than the synthetic lubricant based upon oil sample analysis; inspections also showed lower wear on some parts. Additionally, oil sample analysis from the tandem drive axles showed that the forward axle gave a statistically significant higher wear rate than the rear axle. Transmission and drive axle oil temperatures were monitored during a portion of the test.


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    Title :

    Results of a 500000-mile field test of a gear lubricant and an engine lubricant in heavy-duty manual transmissions


    Additional title:

    Ergebnisse eines 500000 Meilen Feldversuchs eines Getriebeschmierstoffes und eines Motorschmierstoffes in Hochleistungs-Schaltgetrieben


    Contributors:

    Published in:

    Publication date :

    1991


    Size :

    17 Seiten, 20 Bilder, 10 Tabellen, 7 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





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