21 speed

Discussion in 'Experienced Truckers' Advice' started by Panhandle flash, Apr 19, 2014.

  1. Hurst

    Hurst Registered Member

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    Back in the 80's I drove a mid 70's model International that had a Spicer 21 speed. Had a 3 stage splitter on top like a dial. Truck had an old 2 stroke Detroit. Used almost as much oil as it did diesel. Go out 200 mi and guaranteed to be 2 gal low oil by the time you got back.

    Hurst
     
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  3. Mountain Hummingbird

    Mountain Hummingbird Medium Load Member

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    Oct 14, 2012
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    It is a transmission with mid range lo/ midrange/high likely with an overdrive for the upper range.
     
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