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Spicer auxiliary transmission

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Dino soar, Dec 1, 2018.

  1. Dec 1, 2018 #1
    Dino soar

    Dino soar Road Train Member

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    I have a Spicer 8041 auxiliary transmission in an old truck that I have.

    I was wondering besides the weight of it, how good or bad that would be behind the transmission in an F-350.

    I would rather have a 5831, but I don't know if I could find one or where to look.

    It has a 6.9 Diesel with a close-ratio 4-speed. It needs a lower gear to pull out when pulling a heavy load and needs to be able to split the gears.

    Are there any other alternatives?
     
    Last edited: Dec 1, 2018
    Dino soar, Dec 1, 2018
    Dino soar, Dec 1, 2018
    #1
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  3. Dec 1, 2018 #2
    spsauerland

    spsauerland Road Train Member

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    Not sure if still in business, but used to be a two speed box underdive or overdrive box made by company called gear vendors. Buddy had one in a Chevrolet 3500 dually that worked pretty slick.
     
    spsauerland, Dec 1, 2018
    spsauerland, Dec 1, 2018
    #2
    Oxbow, BoxCarKidd and Goodysnap Thank this.
  4. Dec 1, 2018 #3
    BoxCarKidd

    BoxCarKidd Road Train Member

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    I do not recall the brand but I put an O/D unit in place of the tail housing on a Dodge with an auto.
     
    BoxCarKidd, Dec 1, 2018
    BoxCarKidd, Dec 1, 2018
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    Oxbow Thanks this.
  5. Dec 2, 2018 #4
    Dino soar

    Dino soar Road Train Member

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    Well, because it is a 4-speed close-ratio low gear is kind of high and high gear is one to one.

    So really I need a lower low for pulling out and, I need to be able to split the gears, and then overdrive because high gear is one to one.

    So I really need low direct and Overdrive.
     
    Dino soar, Dec 2, 2018
    Dino soar, Dec 2, 2018
    #4
    BoxCarKidd Thanks this.
  7. Dec 2, 2018 #5
    Rubber duck kw

    Rubber duck kw Road Train Member

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    It doesnt have granny low four wheel I'm guessing?
     
    Rubber duck kw, Dec 2, 2018
    Rubber duck kw, Dec 2, 2018
    #5
  8. Dec 2, 2018 #6
    BoxCarKidd

    BoxCarKidd Road Train Member

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    I 6 spd out of a latter model truck would be easier.
     
    BoxCarKidd, Dec 2, 2018
    BoxCarKidd, Dec 2, 2018
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    Oxbow Thanks this.
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