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6.4 problems

Discussion in 'Heavy Duty' started by Shield134, Jun 4, 2019.

  1. Shield134

    Shield134 Junior Member

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    Engine:
    6.7 CTD
    I’m at wits end!! I have an ‘18 3500 crew with a 6.4 and 4.10’s with one issue no one seems to be able to fix. I’ve had the truck for 1 1/2 yrs and since I bought it there has been this annoying whistling/buzzing noise from the front cab that get louder with the rpm’s of the engine and when I step on/off the gas pedal. I had 3 dealers work on it, all three heard the issue, numerous different diagnoses and numerous failures. Idler pulley, hydroboost pump, hydroboost lines, alternator, and several other could be’s that weren’t. To me it sounds like a bad ground or noise canceling problem but all the dealers assured me it wasn’t. The last dealer told me to not worry since the truck isn’t throwing a code even though he heard and acknowledged it. I told him it wasn’t alright to have what sounds like a bee reviving in the dash. I started a case with FCA today but I fear that is going to be no win battle. Aside from that the truck runs good but I can’t take the noise! Has anybody had an issue similar? Thanks
     
  2. U&A

    U&A Senior Member

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    Keep us posted.


    Sent while firmly grasping my redline lubed RAM
     
    AFMoulton likes this.
  3. CincyCuda68

    CincyCuda68 Senior Member

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    Does your truck have the noise cancelling? I have the 2018 6.4 Crew in a 2500 and have heard nothing like that. I have a Tradesman so no frills and no noise canceling.
     
    Khari Ford and AFMoulton like this.
  4. Shield134

    Shield134 Junior Member

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    Yes, mine has noise canceling it’s a big horn
     
    CincyCuda68 likes this.
  5. Iron Outlaw

    Iron Outlaw Senior Member

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    Does noise cancelling work through the radio? Take out the radio fuse and drive it?
     
    JimE likes this.
  6. pwjouster

    pwjouster Senior Member

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    see below
     
  7. pwjouster

    pwjouster Senior Member

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    can we get a video?

    also have you made any changes to the truck?
    wheels?
    steering components?
    audio?
     
  8. Nickx86

    Nickx86 Member

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    What someone else said about the noise canceling might be your issue. In addition you might have a bad speaker that causing your issue. If you have the radio speed compensation on, it would mimic getting louder w the engine/ road
     
  9. Iron Outlaw

    Iron Outlaw Senior Member

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    Just throwing this in there as it doesnt change with speed, but my AC fan sounds like a jet motor when on speed 2. It's really annoying.
     
    Bldrinker likes this.
  10. olyelr

    olyelr Senior Member

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    Have you shut the radio off or muted it to see if the noise goes away?
     

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