Another 2K rattle question.

[03sport007]

2019 Gt with A10. Bought new. So far no tick but at about 1000 miles started noticing what I would call a upper end rattle on slow acceleration between 2K and 3k rpms. Based on what I read here wasn’t to concerned. A couple days ago I was driving with my wife and had the exhaust in quiet mode and the motor didn’t make the “rattle”? So I did a little experimenting and changed the exhaust back to sport mode where I do most of my driving and again could here what sounded like upper end valve noise between 2K and 3K rpms. It’s strange because it doesn’t sound exhaust related? It sounds mechanical almost like the first start after and oil change?

Anybody else with the 2K rattle notice a difference with their exhaust mode in quiet?

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[Linkster1666]

2500 miles on a A10 2019 401a. I just came home from Vegas(90 miles) at 1950-2100 rpm.

Smooth as silk.

It was about 9pm, very quiet. No Magnaride or exhaust.

I got back to town and it was no sound as in Silent. QUIET!! SMOOTH AS SILK!

 

[schmeky]

Several owners have found it's a harmonic in the A/C belt. Ford even issued a TSB for this for their F-150 trucks a few years back.

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