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Tranny grinds when shifting from low to high gears??

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Nestor, Mar 28, 2016.

Page 1 of 3
  1. Mar 28, 2016 #1
    Nestor

    Nestor Light Load Member

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    Oct 21, 2015
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    Hey I was wondering if anyone can help me. So I recently bought a day cab tractor. It has a eaton fuller ten speed. I noticed that when I'm shifting from the low gears to the high gears it grinds pretty bad. I pre select the gear so I put to the splitter in the top position before I go to high gear. Also it grinds when I'm going to a stop and put splitter down. Any one know what this is. Thanks for our help
     
    Nestor, Mar 28, 2016
    Nestor, Mar 28, 2016
    #1
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  3. Mar 28, 2016 #2
    stayinback

    stayinback Road Train Member

    3,911
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    Jan 24, 2014
    chicago,il
    0
    Mine does the same, I just ignored for lets say the last 10 years now.... Mine only grinds when I put the splitter Down
     
    stayinback, Mar 28, 2016
    stayinback, Mar 28, 2016
    #2
  4. Mar 28, 2016 #3
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Aug 26, 2014
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    Search- top right box. It's there.
     
    BoxCarKidd, Mar 28, 2016
    BoxCarKidd, Mar 28, 2016
    #3
  5. Mar 28, 2016 #4
    Nestor

    Nestor Light Load Member

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    Oct 21, 2015
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    What do you mean
     
    Nestor, Mar 28, 2016
    Nestor, Mar 28, 2016
    #4
  7. Mar 28, 2016 #5
    Nestor

    Nestor Light Load Member

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    Oct 21, 2015
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    Why is that do you know ??
     
    Nestor, Mar 28, 2016
    Nestor, Mar 28, 2016
    #5
  8. Mar 28, 2016 #6
    lester

    lester Midwest's #1 Feed Hauler

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    Jan 2, 2012
    NW, Iowa
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    Synchronizer I'd bet.
     
    lester, Mar 28, 2016
    lester, Mar 28, 2016
    #6
    AModelCat Thanks this.
  9. Mar 28, 2016 #7
    Luwi67

    Luwi67 Heavy Load Member

    746
    484
    Oct 24, 2012
    Long island
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    My 13 spd once in a blue moon will grind or make a gear clash noise when going from low to high. It certainly isn't consistent as I can do whole trips at a time and not experience the noise and it only does it from low to high never high to low.

    It's been doing this 10 + years as well. My truck doesn't see high annual mileage so it sounds like you are experiencing advanced symptoms of what mine has.

    Hope someone has a common cause for this, I'd like to fix it before it gets to where you are.
     
    Luwi67, Mar 28, 2016
    Luwi67, Mar 28, 2016
    #7
  10. Mar 28, 2016 #8
    kynsilok

    kynsilok Bobtail Member

    24
    5
    Jun 10, 2014
    0
    Many trucks do that on those 19 and 13 speeds, it gets worse over time, last time I asked my mechanic said it was the slpitter valve.
     
    kynsilok, Mar 28, 2016
    kynsilok, Mar 28, 2016
    #8
  11. Mar 28, 2016 #9
    clausland

    clausland Road Train Member

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    Dec 5, 2014
    North Woods
    0
    Check the filter on the splitter valve, might be blocked somewhat...
     
    clausland, Mar 28, 2016
    clausland, Mar 28, 2016
    #9
  12. Mar 28, 2016 #10
    Nestor

    Nestor Light Load Member

    160
    23
    Oct 21, 2015
    0
    Ok so talked to the mechanic he said its the syncro. There's two of them one from low to high and one is high to low. Wich ever is grinding replace. But checking air pressure to splitter valve and checking filter on splitter to see if it's blocked like clausland said might be a good idea before I get them replaced. Thanks for your guys help this site is awesome!
     
    Nestor, Mar 28, 2016
    Nestor, Mar 28, 2016
    #10
    Wumbo Jumbo Thanks this.
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