X-15 Cummins thread

Discussion in 'Peterbilt Forum' started by KB3MMX, Feb 26, 2018.

  1. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    Don’t get him started on more jibberish again.
     
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  3. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    @Trucker186 , why don’t you go start your own personal thread on 1 millions miles Cat thread. Many will chime in, cause there are many many members that know more than you think on these motors first hand. I personally have one and drive one.
    Here’s a hint, STOP “Hi-jacking this thread. Let it be.........
     
  4. Hegemeister

    Hegemeister Road Train Member

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    X15 performance 525/1850 at 30k running great, getting stronger, not burning any oil between PMs. Liking it.!
     
  5. Trucker186

    Trucker186 Medium Load Member

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    Oh my god im a dumb ### i thought this was the c15 vs x15 thread oh my god. I am very sorry
     
  6. REO6205

    REO6205 Trucker Forum STAFF Staff Member

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    It's being worked on.
     
  7. Trucker186

    Trucker186 Medium Load Member

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    I do have a question and correct me if im wrong but arent the newer dpf engines horrible on fuel mileage so they went to the newer transmission that in your 2nd to last and your last gear is very high geared?
     
  8. Trucker186

    Trucker186 Medium Load Member

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    Please remove all the old stuff i posted
     
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  9. Accidental Trucker

    Accidental Trucker Road Train Member

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    I've got a 2019 t680 with an MX, and it does the same thing, vibrates under heavy load around 1200 rpm. Not horrible, but noticeable. Sounds like it's not the engine but the drive line....

    There are some stories about Paccars leaving the factory with unbalance yokes?
     
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  10. Hegemeister

    Hegemeister Road Train Member

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    Not for nothing, but the homework I've done showed you don't want to pull below 1300 RPM. I run mine from 1300 up to about 1600 or 1700.
     
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