Rattle/buzz when letting off throttle (cold)

[Visage]

Here’s a new one.

2019 GT manual with 6k miles on it. After a cold start and puttering around the neighborhood at slow speeds in 1st and 2nd, letting off the throttle while in gear produces an audible rattle/buzz noise for about .5 to 1 seconds. I can’t tell exactly where it’s coming from.

The car drives normally and the issue seems to go away in a few minutes.
Something to do with the clutch/flywheel maybe?

Any ideas or similar experiences?

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[NGOT8R]

Hold into the reverse lockout collar and see if the noise clears up. My collar rattles against the shifter knob, but I only notice it during the mid to high rpm range.

 

[Visage]

Hold into the reverse lockout collar and see if the noise clears up. My collar rattles against the shifter knob, but I only notice it during the mid to high rpm range.

Thanks for that - but I should clarify - it’s coming from outside the cabin/under the car somewhere.

 

[Mustang gt 2016]

Thanks for that - but I should clarify - it’s coming from outside the cabin/under the car somewhere.

Its normal, this car produces alot of strange noises and everytime i take to the dealership they say its normal. I also have noises when i switch on the AC which none of my friends owning a mustang has and yet dealership say its absolutely normal. So enjoy driving this pony without caring too much

 

[Cobra Jet]

The trans to engine aluminum spacer plate. This is a well known and documented "buzz" or "rattle" that can be RPM specific.

https://www.mustang6g.com/forums/threads/engine-transmission-plate-noise-fix.115718/

https://www.mustang6g.com/forums/th...hen-accelerating-hard-above-4000k-rpm.107728/

There was also another thread but I cannot find it at the moment - but another S550 owner had a rattle that turned out to being the exhaust rubbing against the body.

 

[Visage]

It’s not a normal sound - I’m aware of the coyote noises these motors make. It’s also brand new.

And I don’t think it’s that plate. Those threads are reporting the rattle at higher RPMs and warm. I’m having the issue only when cold.

Thanks for the responses so far.

 

[Cobra Jet]

Here’s another area you may want to check too:
https://www.mustang6g.com/forums/threads/found-source-of-clunk.133988/#post-3309826

 

[Stangnut]

Do you have active exhaustt? There's also a thread about a spring or something being loose.

 

[Visage]

Do you have active exhaustt? There's also a thread about a spring or something being loose.

No but I do have a Borla S Type. Pro installed at a great Mustang/Corvette shop with no issues to date.

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