Eaton fuller 10 speed manual split box valve gets stuck.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by mickutzu2011, Sep 27, 2021.

  1. mickutzu2011

    mickutzu2011 Bobtail Member

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    Oct 25, 2016
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    I have an manual 10 speed transmission and when I don't use it for more than couple a days the split box valve gets stuck. After a lot of down and up shifting the spliter is working. Does anyone knows what the problem?
     
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  3. Dino soar

    Dino soar Road Train Member

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    Dec 8, 2017
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    I'm sure that someone who's an expert will chime in soon enough but my own idea would be the filter regulator or the slave cylinder itself.
     
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  4. MLC Adventures

    MLC Adventures Medium Load Member

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    Probably dry piston seals on the piston, depending on year and model.
     
  5. Spyro2112

    Spyro2112 Medium Load Member

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  6. Don379

    Don379 Medium Load Member

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    So You are missing the shifts then when going from lo-high or high -lo? Or is this just you fiddling with it in neutral and not moving when you arent supposed to do do that?
     
  7. Smellfunny

    Smellfunny Road Train Member

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    What model transmission? Probably need range cylinder kit and clean real good. Plus make sure contaminants are not getting into your air system.
     
  8. mickutzu2011

    mickutzu2011 Bobtail Member

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    Oct 25, 2016
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    When it's cold it shifts 1 thru 5. When I try to go hi on 6 doesn't work. Them I flip the hi-low switch until I hear that click down in the the transmission and it works just fine after
     
  9. mickutzu2011

    mickutzu2011 Bobtail Member

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    Oct 25, 2016
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    I really don't know the transmission model. I know that is a eaton fuller 10 speed
     
  10. kranky1

    kranky1 Light Load Member

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    Sep 16, 2015
    Nova Scotia, Canada
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    Before I bought a kit i’d try just changing the air filter. You only have to drop a couple psi inlet pressure at the shift solenoid before it won’t shift right. New filter may cure it.
     
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