Gear Ratio change for fuel savings.

Discussion in 'Car Hauler and Auto Carrier Trucking Forum' started by bmercer, Jul 13, 2017.

  1. bmercer

    bmercer Bobtail Member

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    Sep 27, 2011
    Rolesville,NC
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    Tall
     
  2. Roberts450

    Roberts450 Road Train Member

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    Transmission Ratio RPM Calculator | Spicer Parts

    Something dosent sound right with your numbers.

    4.11 gears
    44" tire if your running 11r24.5's
    1600rpm
    .73 high gear
    Puts you at 69.83mph according to this calculator. Now in you are running lowpro 24.5's or 42" tire it puts you closer to your number at 66.66 mph. But if you are at 11r24.5's then 4.33 would be closer to your numbers. Unless your speedometer is off.
     
    bmercer and KANSAS TRANSIT Thank this.
  3. bmercer

    bmercer Bobtail Member

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    Sep 27, 2011
    Rolesville,NC
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    I could be off some on numbers.
    It's hard to get exact off the tachometer @ speedometer on the truck.
    The tires are 11R24.5's . I know it's a 411 from info attained from International.
    The speedometer is different from GPS by about 2 mph.
     
  4. Roberts450

    Roberts450 Road Train Member

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    Is your speedometer faster or slower then the gps? At any rate with a 10sp I wouldn't drop and lower then 3.7x gears. It will drop you out of your RPM band and make your mileage worse. If you had a 13 it would give you a little better options. Just gotta remember if its not a CAT you gotta run a little higher in rpms for better performance.
     
    bmercer Thanks this.
  5. ffx1

    ffx1 Bobtail Member

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    Aug 14, 2018
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  6. ffx1

    ffx1 Bobtail Member

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    Aug 14, 2018
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    Fierce Fuels X1 is it it's 4th year of test market. It is a proven fuel system optimizer (no additives) along with other great benefits. Again, they have worked to get this fuel optimizer right. Check it out on YouTube, Ron tells his story. Copy and paste the following link.

    You can contact me at aja3100@gmail.com for more info if you are interested. This is the "real deal"!
    Good luck on saving money every trip.
     
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