Disturbing intermittent grinding noise

Discussion in 'Raptor Maintenance' started by Wes Skaperdas, Dec 31, 2018.

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  1. Wes Skaperdas

    Wes Skaperdas Member

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    I'm a new owner of a used 2018. 12,500 miles on it. Since buying it a month ago it makes an unsettling noise after running for 20 minutes or more. Sounds like when you were a kid and your bike chain got too loose: The sprocket would spin without completely engaging the chain links, making a grinding noise, and then . . . clunk . . . it would engage again. That's as close as I can come to describing it. Sometimes it's just for a few seconds; sometimes it goes on for 10 or 15 seconds. It happens in 7th gear or above and typically above 50 mph. Sometimes it will do it many times in a 30 minute period, and sometimes not at all. Sometimes it stops immediately when I press the accelerator, other times it doesn't.

    Perplexing.

    I have a service appointment later this week but am concerned the service techs won't drive it long enough to experience the problem. Would like to point them in a direction if anyone else has had this happen to them.

    Than in advance.
     
  2. Adam

    Adam Full Access Member

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    Any video you can post, does it do it on a cold start ? Only other thing for the grinding noise is the IWE. Cheap part but goes out often.
     
  3. Wes Skaperdas

    Wes Skaperdas Member

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    Thanks for replying.

    No . . . only after running for awhile. Sometimes 30 minutes into a drive, sometimes longer. Totally unpredictable.
    I don't have any video but another owner posted a short video that had the same noise: His problem was a cracked front hub.

    My truck is in the shop now, and I shared the video. The service adviser also said there is a problem with a 4WD-related component so they're looking at that, as well.

    I'll post whatever solution they come up with.
     
  4. Wes Skaperdas

    Wes Skaperdas Member

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    Epilog . . .

    Problem was a bad 4X4 Vacuum Check Valve. There's a TSB on it . . . . 182273A.7
     
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  5. Adam

    Adam Full Access Member

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    Easy fix, hoepfully the last
     
  6. Wes Skaperdas

    Wes Skaperdas Member

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    Amen!
     
  7. CAlex2441

    CAlex2441 New Member

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    Literally had this exact problem. Exact. Same year and mileage. I was able to replicate the noise by getting the truck warm, driving for a little, then shutting it off- and turning back on immediately. The grinding noise in full bloom and I have a video I can text you so you can see if it’s the same. I went to Gator Ford in Tampa and they heard it, diagnosed it, and swapped the muffler/exhaust. Problem solved.
     
  8. Wes Skaperdas

    Wes Skaperdas Member

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    Interesting. Another guy posted a video that sounded identical and his problem was a cracked front hub.
    Mine turned out to be a faulty vacuum check valve. Service Tech immediately suspected that when I explained the problem, and there was even a Technical Bulletin on it. It fixed the problem.
     
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  9. Adam

    Adam Full Access Member

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    Glad to hear man, Im up for a fix on Tuesday at dealer
     
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  10. Wes Skaperdas

    Wes Skaperdas Member

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    Good luck!
     
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  11. Adam

    Adam Full Access Member

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    Thanks, done and it feels so nice not to have metal grinding at the pedal.
     
  12. John Cater

    John Cater Member

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    I had a noise that could vaguely be described as "grinding" and they said it was a check valve problem. They replaced it but it didn't fix the problem. Would you mind posting that video you said you have so I can compare the sounds?
     

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