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Thoughts on Proper gear ratio

Discussion in 'Ask An Owner Operator' started by Jasongordyn, Jul 25, 2020.

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  1. Jul 25, 2020 #1
    Jasongordyn

    Jasongordyn Bobtail Member

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    I need some great advice, from some great people, regarding proper gear ratio for a Super Bee in the mountains, currently I have a 500 ISX Eaton 18 with 3.90 gears and 24.5 tires. Needless to say the old girl is getting tired and I and I'm looking at a truck. I'm looking at a DD16 600 horse DT12 transmission (I'm sick of shifting 30+years)with 3.58 gears in 22-5 tire. Now I know there's a lot of smart people out there, is there anybody with any thoughts on this? Thanks in advance.
     
    Jasongordyn, Jul 25, 2020
    Jasongordyn, Jul 25, 2020
    #1
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  3. Jul 25, 2020 #3
    Gus4800

    Gus4800 Bobtail Member

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    Do not buy anything dd15 are dd16 they are garbage

    .
     
    Gus4800, Jul 25, 2020
    Gus4800, Jul 25, 2020
    #3
  4. Jul 25, 2020 #3
    abyliks

    abyliks Road Train Member

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    What are you grossing? 3.58 might be great for cruising through The flat lands at 80, but if your in the mountains I would probably be wanting a 3.90-4.10
     
    abyliks, Jul 25, 2020
    abyliks, Jul 25, 2020
    #3
    Brettj3876 and singlescrewshaker Thank this.
  5. Jul 25, 2020 #4
    Crude Truckin'

    Crude Truckin' Alien Spacecraft

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    How do you figure, bud?
     
    Crude Truckin', Jul 25, 2020
    Crude Truckin', Jul 25, 2020
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    singlescrewshaker Thanks this.
  7. Jul 25, 2020 #5
    Cat sdp

    Cat sdp . .

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    I’d have to do the math....

    but 3.58 with 22.5 has to be very close to 3.90 with 24.5...gear wise.

    I always prefer the 24.5/3.90 or 4.10 but that’s me.....
     
    Cat sdp, Jul 25, 2020
    Cat sdp, Jul 25, 2020
    #5
    Brettj3876 Thanks this.
  8. Jul 25, 2020 #7
    Jasongordyn

    Jasongordyn Bobtail Member

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    Jasongordyn, Jul 25, 2020
    Jasongordyn, Jul 25, 2020
    #7
  9. Jul 25, 2020 #8
    Jasongordyn

    Jasongordyn Bobtail Member

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    Thx! someone told me something close to that, I just don't know the math. lol
     
    Jasongordyn, Jul 25, 2020
    Jasongordyn, Jul 25, 2020
    #8
  10. Jul 25, 2020 #8
    Jasongordyn

    Jasongordyn Bobtail Member

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    I have heard this, but the funny thing is, it is with used, not new with warranty first three years are good.
     
    Jasongordyn, Jul 25, 2020
    Jasongordyn, Jul 25, 2020
    #8
  11. Jul 25, 2020 #9
    Jasongordyn

    Jasongordyn Bobtail Member

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    Mostly 60kg or so
     
    Jasongordyn, Jul 25, 2020
    Jasongordyn, Jul 25, 2020
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    singlescrewshaker Thanks this.
  12. Jul 25, 2020 #10
    Cat sdp

    Cat sdp . .

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    Go on Eaton’s web site they have a calculator.....
     
    Cat sdp, Jul 25, 2020
    Cat sdp, Jul 25, 2020
    #10
    singlescrewshaker Thanks this.
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