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Super 10 to 18 spd

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by drewfarmsllc, May 21, 2022.

  1. May 21, 2022 #1
    drewfarmsllc

    drewfarmsllc Light Load Member

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    Oct 18, 2008
    South Carolina
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    I have a 98 379 with a 12.7 Detroit and super 10 trans. I want to put an 18 speed in but not sure all in entails. How do make sure I get the correct trans? Is there a place I can put my old trans number and it will let me know what I can use?? Ratios and length
     
    drewfarmsllc, May 21, 2022
    drewfarmsllc, May 21, 2022
    #1
    Another Canadian driver Thanks this.
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  3. May 21, 2022 #2
    kranky1

    kranky1 Road Train Member

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    Ontario, Canada
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    All you have to do is compare the high gear ratio in the 10 to the high gear ratios in an RTO and RTOO 18spd. You’re probably going to end up a little faster with a single over, and the double over might be ridiculous.
     
    kranky1, May 21, 2022
    kranky1, May 21, 2022
    #2
    Another Canadian driver Thanks this.
  4. May 22, 2022 #3
    RockinChair

    RockinChair Road Train Member

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    Feb 19, 2012
    CC, TX
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    What's the number of your current transmission?
     
    RockinChair, May 22, 2022
    RockinChair, May 22, 2022
    #3
    Another Canadian driver Thanks this.
  5. May 22, 2022 #4
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Aug 26, 2014
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    Search Eaton Fuller transmission ratios. If it is still on line it lists all the transmissions, ratios and length.
    That is a pretty direct swap if the replacement has the same shift tower location. Yoke is the same size or will swap. Halo or no Halo, not a concern if it comes with a bell housing.
     
    BoxCarKidd, May 22, 2022
    BoxCarKidd, May 22, 2022
    #4
  7. May 22, 2022 #5
    little cat 500

    little cat 500 Road Train Member

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    Jan 17, 2010
    Abbottstown PA
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    Super ten is the same length as a 13 or 18 direct swap except the shifter tower on the super ten is different
     
    little cat 500, May 22, 2022
    little cat 500, May 22, 2022
    #5
    Roger McG and LameMule Thank this.
  8. May 22, 2022 #6
    LameMule

    LameMule Road Train Member

    1,147
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    Jan 19, 2020
    Montana
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    Pretty straightforward install from my experience. New clutch and clutch brake and a yoke to match your driveline. You will likely need to go to a driveline shop to have it shortened or lengthened depending on the conversion. New trans should come with shifter and color coded airlines.
     
    LameMule, May 22, 2022
    LameMule, May 22, 2022
    #6
  9. Jun 2, 2022 #7
    drewfarmsllc

    drewfarmsllc Light Load Member

    80
    26
    Oct 18, 2008
    South Carolina
    0
    Thanks for the replys
     
    drewfarmsllc, Jun 2, 2022
    drewfarmsllc, Jun 2, 2022
    #7
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