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Eaton 10 speed transmission Issues

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Nefi, Nov 3, 2017.

  1. Nov 3, 2017 #1
    Nefi

    Nefi Bobtail Member

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    Jan 16, 2016
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    Trying to figure out what happened today. I have a 2010 Kenworth with a 10 speed trasmission. I came to a stop like normal, threw my splitter down to shift it into first gear to take off and would not walk anymore. Started loosing pressure and after would not build pressure more than 50 on prime and less than 100 on secondary. Got off the truck and had a big air leak coming from under the cab. And the weird thing is and has me scratching my head, is even with having the truck stalled and with the engine running I was able to put it in gear without pressing on the clutch and it was not go any where. Ended up getting pulled to the nearest shop with my buddy's truck. If you might have experience this, let me know. Or if you have any ideas of what it might be let me know as well. Thanks in advanced!
     
    Nefi, Nov 3, 2017
    Nefi, Nov 3, 2017
    #1
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  3. Nov 3, 2017 #2
    wtokhi

    wtokhi Light Load Member

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    Nov 3, 2017
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    its possible that when you split it thats when the leak started, the splitters run on air pressure
     
    wtokhi, Nov 3, 2017
    wtokhi, Nov 3, 2017
    #2
    Nefi Thanks this.
  4. Nov 3, 2017 #3
    Cattleman84

    Cattleman84 Road Train Member

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    Nov 1, 2017
    The Sticks, Idaho
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    Splitter maybe stuck between high and low because it lost air pressure... Not a transmission guy so I could be wrong.
     
    Cattleman84, Nov 3, 2017
    Cattleman84, Nov 3, 2017
    #3
    Nefi Thanks this.
  5. Nov 3, 2017 #4
    bjytech

    bjytech Light Load Member

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    Nov 9, 2013
    Ohio
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    Sounds like when you went to shift range to the low side a line or seal blew and it only partially moved the synchronizer before losing pressure to the piston effectively putting it in neutral. Get whatever the air is leaking from fixed and try it then, most likely that's your only problem.
     
    bjytech, Nov 3, 2017
    bjytech, Nov 3, 2017
    #4
    Nefi Thanks this.
  7. Nov 3, 2017 #5
    WrenchWrenchWrench

    WrenchWrenchWrench Light Load Member

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    Jan 3, 2016
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    Here's a link to every Eaton transmission service manual you would ever need. There is troubleshooting instructions for different symptoms in them, including air system problems. Sounds like worst case scenario you have to pull the top plate to get to the splitter.

    Eaton Transmission Service Manuals in PDF
     
    WrenchWrenchWrench, Nov 3, 2017
    WrenchWrenchWrench, Nov 3, 2017
    #5
    Super_Trucker, Nefi and BoxCarKidd Thank this.
  8. Nov 4, 2017 #7
    Nefi

    Nefi Bobtail Member

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    Jan 16, 2016
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    It was the shift module. That's where the air leak was coming from, 400 and something is the part and 700 something for labor, yay me lol
     
    Nefi, Nov 4, 2017
    Nefi, Nov 4, 2017
    #7
  9. Nov 4, 2017 #7
    Nefi

    Nefi Bobtail Member

    8
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    Jan 16, 2016
    0
    It was the shi
    it was the shift module
     
    Nefi, Nov 4, 2017
    Nefi, Nov 4, 2017
    #7
  10. Jun 26, 2019 #8
    Arodjasso23

    Arodjasso23 Bobtail Member

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    2
    Apr 18, 2019
    0
    I have a 2006 Kenworth t800 with a lightning series super 10 tranny. This morning I was going to work and I was leaving the yard and my truck won’t shift into the high gears. Gears 1-5 work but I can’t hit the low gears. Service light on shifter is blinking any help?
     
    Arodjasso23, Jun 26, 2019
    Arodjasso23, Jun 26, 2019
    #8
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