24 Dark Horse high frequency highway vibration

[Shneakyman]

My 2024 GT had this issue. 6 Speed. I knew Ford would never find it so I traded out of it and ate the $$. I was very annoying. It was the worse on 3rd gear @ 62 mph. I don't remember the RPMs now but whatever it was it was repetitious,

Mines an auto and rpm doesn't seem to affect it. Most others that I have seen, like yourself, that have had this issue have either traded or filed lemon law.

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[Shneakyman]

Sorry I'm late with the update. Issue was fixed with replacement of the rear axle (rear diff assembly). It did get noticeably worse with the new driveshaft and diff rebuild so not sure if there was something between how it was rebuilt or the new driveshaft and old diff. But regardless it's fixed!