18 speed air line help

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by DieselFuelOnly66, Jun 20, 2024.

  1. DieselFuelOnly66

    DieselFuelOnly66 Bobtail Member

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    Aug 5, 2023
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    I got a 18 speed eaton in my kenworth and I wanted to put 2 of those old style air plungers on instead of the normal shift knob but the 18 speed only has 3 airlines so wondering how I would need to run the airlines to have one plunger for hi/low and one for splitter
     
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  3. Inderjit

    Inderjit Medium Load Member

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    There is only one air supply line for the single valve.
    You need to "Tee" the existing supply or plumb in a second line.
     
  4. DieselFuelOnly66

    DieselFuelOnly66 Bobtail Member

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    Aug 5, 2023
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    Thanks bud.. I thought that but wanted to make sure before I took things apart
     
  5. Inderjit

    Inderjit Medium Load Member

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    You may also have to reverse the air lines on the range cylinder.
    I converted quite a few older style air shift valves to the newer type.
     
  6. Lazer

    Lazer Road Train Member

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    You wanna be like that guy on You Tube, with the 18sp, one stick for the range, one stick for the splitter, and one stick for the gears!!!
     
  7. DieselFuelOnly66

    DieselFuelOnly66 Bobtail Member

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    Aug 5, 2023
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    Not quite lol not enough room in a narrow cab kenworth for that haha... just want to old school look with the plungers
     
  8. DieselFuelOnly66

    DieselFuelOnly66 Bobtail Member

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    Aug 5, 2023
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    Do I have to switch them on the trans or just flip them on the range.valve on the stick?
     
  9. Inderjit

    Inderjit Medium Load Member

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    You may have to swap the lines at the rear of the transmission on the range cylinder.
    Swapping them on the valve on the stick will not work.
     
  10. DieselFuelOnly66

    DieselFuelOnly66 Bobtail Member

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    Aug 5, 2023
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