What Gears Do I have

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by cgilliland, Jan 21, 2022.

  1. cgilliland

    cgilliland Medium Load Member

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    Seller said 3:36, me thinks 3:55
    how can i tell for sure

    the calcs dont seem to return a clear answer
    18spd
    22.5LP
    top gear 72mph at 1650rpm
     
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  3. 062

    062 Road Train Member

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  4. cgilliland

    cgilliland Medium Load Member

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    Mar 13, 2017
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    thanks
    pretty much only .73 or .85 right
     
  5. cgilliland

    cgilliland Medium Load Member

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    Mar 13, 2017
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    i guess i gotta find the model number
     
  6. Rideandrepair

    Rideandrepair Road Train Member

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  7. cgilliland

    cgilliland Medium Load Member

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    Mar 13, 2017
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    thanks everyone i am sure you are right its 3.73
    i want 3.36 i think
    lower my rpms 150 at cruise speed
     
  8. istumped

    istumped Medium Load Member

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    Feb 8, 2015
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    Call the dealer with the vin# ask them what the gear ratio is from factory.
     
    cgilliland Thanks this.
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