Embarrassing Squeak on rear end!!??? help

[Stanv03]

Hello, so my 2020 mustang GT recently started squeaking from my rear end when I go over a speed pump or a dip on the road or highway. At first I thought it was on the driver rear but I noticed today that it only does when both wheels go over speed bump so I’m thinking something in the middle. But I’m no expert in this. It’s supper embarrassing and annoying. It started a little over a month ago, would anyone know what it might be? Everything is stock except my lowering springs. I got Eibach Pro kits installed back in May. Please if anyone could help out, It would be very much appreciated ! :(

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[Oakley]

whatever that is its metal on metal. how's your brake pads lookin?

 

[Stanv03]

whatever that is its metal on metal. how's your brake pads lookin?

They have some life on them. But I’m very sure it’s not my pads because it’s not when I break. It’s only when I go through speed bumps or dips on the road. Yesterday I was going 60 on the highway with my windows rolled down and I went through a small dip and still heard it. If you click this link, it’s to my Reddit where I also posted my question but I also posted 3 different videos of it because on here it didn’t allow me due to the file being too big.(https://reddit.com/r/Mustang/s/heSZ1vGQVs)

 

[Oakley]

fair enough. you gotta look under the car then.

 

[R.Smith]

I too recently noticed, at bumps, an annoying squeak in the rear end of my 2014. After reading a number of posts where owners are replacing LCAs and various parts, even shocks, it struck me to first lubricate all bushings before willy-nilly replacing any parts. Over time dirt accumulates in bushings at the metal to metal contacts. In my case I went under the rear end and sprayed all bushings with lube using Seafoam Deep Creep. WD40 or similar should produce same results. If the rubber bushings appear to be fatigued, you might saturate the rubber bushings with ATP AT-205 (rubber/gasket rejuvenator ).

In my case this stopped the squeaking immediately. I hope this saves others a lot of money, time, and aggravation.

Peace

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