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I'm looking to buy a tractor. What does the "ratio" mean in the description of used tractors and what's best?

Posted by admin in used tractors on February 19th, 2009

I speak of a tractor part of a tractor-trailer combo such as a peterbilt model 379-127 etc. Sample ratios are "4.10", "2.79", "3.55" etc.

That is the gear ratio of the rear ends. Also called the final drive ratio. It means that for every 4.10 revolutions of the driveshaft the rear wheel turns 1 revolution.

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3 Responses to “I'm looking to buy a tractor. What does the "ratio" mean in the description of used tractors and what's best?”

  1. Comment by trashy
    February 19th, 2009 at 11:20 pm

    thats the gear ratio. some are for heavy pulling and some geared more for speed.
    References :

  2. Comment by dtwladyhawk
    February 19th, 2009 at 11:53 pm

    Good for you. When you go look at it ask the sales person, they get a commission you might as well get something back. Besides these guys are ate up with feeling important.
    References :
    husband was a truck driver for 7 yrs. My aunt has her own company.

  3. Comment by Ron B
    February 20th, 2009 at 12:00 am

    That is the gear ratio of the rear ends. Also called the final drive ratio. It means that for every 4.10 revolutions of the driveshaft the rear wheel turns 1 revolution.
    References :

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