18 Speed

Discussion in 'Ask An Owner Operator' started by johnsonbar502, Jan 16, 2022.

  1. johnsonbar502

    johnsonbar502 Bobtail Member

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    For those owner operators that haul with an 18-speed gear box,
    do you notice anything really different, money wise in the performance
    of your rig? I mean, fuel savings, easier hauling, better gear selections
    for various conditions. To me, it just seems like a lot of gear shifting
    and motions. To qualify myself, the highest box I had, was 13, and
    that was plenty, for FAK, dry bulk and hauling stone on flats.
     
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  3. 062

    062 Road Train Member

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    You don’t have to split every gear, but it’s there if you need it.
     
  4. LameMule

    LameMule Heavy Load Member

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    They really shine in a rock truck or log truck. Anything heavy or off highway and the 18spd is what I prefer.

    I was told that they shift best when the shifter scrapes the roof though...
     
  5. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    They really shine in OTR when you sell. I can definitely see their value in steep terrain
     
  6. motocross25

    motocross25 Road Train Member

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    Overland Park, KS
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    I’m not an owner op but I drive a truck with an 18. I don’t keep track of fuel
    mileage probably as well as I should admittedly, but I can’t tell much if any of a difference between the 18 speed and 13 and 10’s that I’ve been assigned in the past. I do a lot of off road driving and county road hopping and the extra gears are sometimes advantageous. Other than that, out on the highway I just split the top 2 holes.
     
  7. Banker

    Banker Road Train Member

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    I built my 2015 389 Glider following the once often used motto of “Gear fast and run slow”. I went with an 18speed and 2:64 ratio so that I could run in direct drive, (16) the most fuel efficient gearing position the majority of the time up to 65 or so. When I run 70 or so I run in single overdrive(17). Seldom do I use 18 but it is there if I run out west and need the speed. Many people may not need an 18 speed to operate just as efficiently. It works well for my operation, but a 13 speed likely would work nearly as well.
     
    Catmando, dirthaller and Opendeckin Thank this.
  8. AModelCat

    AModelCat Road Train Member

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    Its all about options. Most of the time I just put it in high split and drive it like a 9 speed.
     
  9. scoobertdoo

    scoobertdoo Heavy Load Member

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    I had an 18 speed in the 249,000# pump truck I use to drive. I drove it like a 9 speed, and rarely hit the first 3 gears. That being said my 10 speed would be better with a splitter on 10th.
     
  10. jason6541

    jason6541 Road Train Member

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    Omaha, NE
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    Ok like my 18 for versatility, I like to roll from a stop loaded or mty in deep reduction low. easy on clutch and drive train. Versus the clowns who take off in 3 rd loaded and slip the clutch. I can drive it like a 9,13, 18
    Really like low deep when rolling thru dirt lots of bomb crater parking lots. Roll nice and slow and not stir up dust.
     
  11. LameMule

    LameMule Heavy Load Member

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    Jan 19, 2020
    Montana
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    Until the fan kicks on!!! Lol I always hate that.
     
    Speed_Drums, Oxbow and Speedy356 Thank this.
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