Slight grinding noise when accelerating

Tiny
OCSKILIT
  • MEMBER
  • 2010 FORD FLEX
  • 3.5L
  • V6
  • TURBO
  • 4WD
  • AUTOMATIC
  • 183,000 MILES
While driving recently, I noticed that my vehicle was making a weird slight grinding noise when accelerating. It was first noticed when decelerating and went away. Thought it may be the PTU.
Thursday, October 21st, 2021 AT 8:15 PM

5 Replies

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

Does it make the noise all the time?
What happens when you hit the brake, does it go away?

Here is a helpful guide on typical grinding noise:

https://www.2carpros.com/articles/vehicle-grinding-noise

If you can upload video, so we can hear the noise, that would be helpful.

Please let me know what you have been experiencing.
Thank you.
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Thursday, October 21st, 2021 AT 8:56 PM
Tiny
OCSKILIT
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  • 3 POSTS
No, it only makes the noise when accelerating. If I coast, it does not make the noise. I have a video from inside the car.
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Thursday, October 21st, 2021 AT 10:05 PM
Tiny
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It almost sounds like the exhaust heat shield rattling. There is a heat shield on the exhaust manifold it makes similar noise when loose.

If you are in park and give it gas, does it make this noise?
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Thursday, October 21st, 2021 AT 10:23 PM
Tiny
OCSKILIT
  • MEMBER
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No, it does not. Only on acceleration and not in neutral.
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Thursday, October 21st, 2021 AT 11:47 PM
Tiny
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  • MECHANIC
  • 6,383 POSTS
Which makes it trickier to hear the noise as you can't just start and listen to it.
Have you had any recent services done for the any of the drivetrain component?
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Saturday, October 23rd, 2021 AT 8:19 PM

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