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2016 T680

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by GraniteState, Dec 27, 2020.

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  1. Dec 27, 2020 #1
    GraniteState

    GraniteState Light Load Member

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    Aug 23, 2009
    Allenstown, NH
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    Finally took the plunge into being an owner operator.
    Bought a 2016 T680 from TransAm
    Paccar engine
    Eaton Fuller Transmission
    Keep having issues with the transmission. Transmission works well for a few hundred miles then I start getting service transmission lights flashing and it starts to slip a bit or shift rough from 8-10. When reversing its shake rattle and roll. Other times it stops reversing completely.
    Trucks at Kenworth again, 3rd time since I've owned it.
    Are their known problems with the eaton fuller? Last time I used one was in 2015 and I didn't like that one either.
    Is it possible to change the transmission to a cummings? About how much would that cost roughly?
     
    GraniteState, Dec 27, 2020
    GraniteState, Dec 27, 2020
    #1
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  3. Dec 27, 2020 #2
    AModelCat

    AModelCat Road Train Member

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    There's no such thing as a Cummins transmission.
     
    AModelCat, Dec 27, 2020
    AModelCat, Dec 27, 2020
    #2
    runningman0661, Midwest Trucker and Goodysnap Thank this.
  4. Dec 27, 2020 #3
    GraniteState

    GraniteState Light Load Member

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    Aug 23, 2009
    Allenstown, NH
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    Oh just assumed cummings had their own transmission to go along with their engine.
    Just looked up a truck I drove earlier in the year as well.
    International LT Cummings engine with an eaton fuller. Didn't have any of the problems with that truck that I'm experiencing with my t680. My t680 reminds me of my first experience with autos from 2015 which wasn't pleasant.
    The LT was the first auto since the 2015 cascadia. LT handled very well in all backing. My 680 not so much.
     
    GraniteState, Dec 27, 2020
    GraniteState, Dec 27, 2020
    #3
  5. Dec 27, 2020 #4
    Judge

    Judge Road Train Member

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    I’d say you need to change oil in transmission, the DT12 autos have a filter in there too, Not sure about the Eaton auto, I’m sure they would.
    Service intervals claim 500k miles,
    I personally won’t go that far, I change my transmission and rear end oil every year, around Christmas week, when everyone home doing nothing, an owner operator should take time and do something to their trucks, if the truck don’t eat, nobody does.
     
    Judge, Dec 27, 2020
    Judge, Dec 27, 2020
    #4
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  7. Dec 27, 2020 #5
    mitrucker

    mitrucker Road Train Member

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    Lapeer, MI
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    Or a Cummings anything for that matter.
     
    mitrucker, Dec 27, 2020
    mitrucker, Dec 27, 2020
    #5
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  8. Dec 27, 2020 #6
    Evil_E

    Evil_E Heavy Load Member

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    Dexter,MI
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    Evil_E, Dec 27, 2020
    Evil_E, Dec 27, 2020
    #6
    jim3029, jsnell, Farmtractor9900 and 1 other person Thank this.
  9. Dec 27, 2020 #7
    Goodysnap

    Goodysnap Road Train Member

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    Goodysnap, Dec 27, 2020
    Goodysnap, Dec 27, 2020
    #7
  10. Dec 27, 2020 #8
    Evil_E

    Evil_E Heavy Load Member

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    I disagree. This transmission was originally designed for Paccar and was exclusively available behind the MX-13 and Cummins X15. With the technology in these new engines, the necessity of communication between the engine and transmission is greater than ever. I can guarantee if Cummins or Paccar puts their name on it, they had engineers on the project.
    Also if you have ever driven a truck with this transmission, then you would agree it's next level performance.
     
    Evil_E, Dec 27, 2020
    Evil_E, Dec 27, 2020
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  11. Dec 27, 2020 #9
    Goodysnap

    Goodysnap Road Train Member

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    Maybe your right........Im not saying they didnt recieve input from engine manufacturers.

    The trans was origanally propritary to Paccar and chassis equipped with Paccar engines. It is 100% designed and manufactured by Eaton corporation. Just like the Paccar 40K diffs are 100% designed and manufactured by Meritor.

    The badge and name game is purley marketing. Again, JMO
     
    Goodysnap, Dec 27, 2020
    Goodysnap, Dec 27, 2020
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  12. Dec 27, 2020 #10
    AModelCat

    AModelCat Road Train Member

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    Eaton autos are just automated versions of their manual transmission. No internal clutches and oil has nothing to do with shifting. Its just an Eaton manual transmission with an XY shifter in place of a tower/lever and an actuator to control the clutch.
     
    AModelCat, Dec 27, 2020
    AModelCat, Dec 27, 2020
    #10
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