Can auxiliary be changed on 8LL?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by W Bench Farms, Oct 5, 2022.

  1. W Bench Farms

    W Bench Farms Light Load Member

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    Can the auxillary on an Eaton 8LL be changed to make it a 13? I have an 8LL that was supposed to be a 13, but the seller didn't know what they sent me. Now they won't stand behind their mistake. Trying to figure out my next step and thought if just the auxillary could be changed I may try to find one.
     
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  3. BoxCarKidd

    BoxCarKidd Road Train Member

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    For anyone to be able to answer that question they need more information.
    What is the model number?
    What are you wanting to change it to?
     
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  4. special-k

    special-k Road Train Member

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    No. The 8LL is a close cousin to a 15 spd. Basically a heavy duty 9/10 spd with a deep reduction for getting moving in soft soil or with heavy loads on hills etc. Once you get used to the bigger gap's between gears they're a really nice transmission imo.
     
  5. W923

    W923 Medium Load Member

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    For a dump truck.
    I hate mine in my semi running 100-140 gross.
    I don’t believe they can be made into a 13 speed either
     
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  6. AModelCat

    AModelCat Road Train Member

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    All depends on the main box. My 15 speed can convert to a 10 by swapping the 3 speed aux to the appropriate 2 speed aux.
     
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  7. special-k

    special-k Road Train Member

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    Ya I should have clarified under 100000 gross. The big gaps can get old when you're over that or if you don't have an engine that pulls well over a wide rpm range. I always wished you could split the top gear in my 8LL for pulling rolling hills when you're grossed out at 139,500
     
  8. BoxCarKidd

    BoxCarKidd Road Train Member

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    Why can I not find post number 1 ?
    Weight you are grossing has nothing to do with what is available with auxiliary box options.
    I am out of here. Good Day.
     
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