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Any Allison Techs on here?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by rbrauns, Sep 22, 2020.

  1. Sep 22, 2020 #1
    rbrauns

    rbrauns Light Load Member

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    Are there any Allison Techs or Engineers on here? I've got some technical questions about the 4500 and 4700 transmissions.
     
    rbrauns, Sep 22, 2020
    rbrauns, Sep 22, 2020
    #1
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  3. Sep 22, 2020 #2
    spsauerland

    spsauerland Road Train Member

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    Not an Allison tech, but have 4500 RDS transmission in half dozen or so trucks. What are you after?
     
    spsauerland, Sep 22, 2020
    spsauerland, Sep 22, 2020
    #2
    pushbroom Thanks this.
  4. Sep 24, 2020 #3
    rbrauns

    rbrauns Light Load Member

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    Thanks for your reply. I want to know if the planetary gearsets from the 4700 can be changed. Specifically, the 4700RDS has a 4th planetary gearset with 7.53:1 ratio and second is 3.51:1, which is the first gear in the 4500 series. Can that gearset be moved to where first is on the 4700 series?

    Out of curiosity, what work are you doing that you need half a dozen Allisons?
     
    rbrauns, Sep 24, 2020
    rbrauns, Sep 24, 2020
    #3
  5. Sep 24, 2020 #4
    spsauerland

    spsauerland Road Train Member

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    West Harrison, In
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    My understanding on the 4700 vs 4500 was what you are talking about, it has the creeper gear. It is targeted @ ready-mix work. We have the 4500RDS in seven quad axle dump trucks. We had issues with off-road maneuverabiliy in three of them and it turned out power train protection was turned on. Turned it off and haven't had issue since.
     
    spsauerland, Sep 24, 2020
    spsauerland, Sep 24, 2020
    #4
  6. Jan 1, 2022 #6
    Kodihi

    Kodihi Bobtail Member

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    Jan 1, 2022
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    Do you happen to know the part number on the rear upper brace for the 4500rds?
     
    Kodihi, Jan 1, 2022
    Kodihi, Jan 1, 2022
    #6
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