Steering wheel vibration after steeda lowering springs

[Stang24]

Recently I got my steeda progressive sport lowering springs for my 2024 Mustang GT. As soon as I got them installed I’ve been having an issue I’m trying to chase. When I apply the brakes at 60-65mph I get a vibration/pulsation in the steering wheel. Only at those speeds. Even if I apply the brakes at 75 mph and I’m on the brakes till about 50mph the steering wheel won’t start to vibrate until 60-65mph and then go away at 50 which is odd to me. When i got my alignment after the springs were installed my passenger side caster was 8.0° and my driver side was 7.1° people told me to correct that and that could be the issue well I bought caster camber plates and corrected that now my caster is at 7.5° passenger side and 7.4° driver side and the issue still persists. My wheels are balanced I don’t think it would be my wheels. What could it be? Rotors?? If my rotors were warped wouldn’t it vibrate the steering wheel at any speeds and not only 60-65mph that’s what’s throwing me off. Other than that car drives straight as an arrow and doesn’t drift off and feels great. Any help is appreciated thanks
I also plan on tracking the car a few times this summer and this issue would be super irritating when cornering and braking

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[roket]

i asked a guy i know that does a lot of aftermarket/accessories stuff, he says it could be brakes or wheel/tire balance, but other than that he's not really sure. might be worth getting it to a shop to get the issue diagnosed and fixed properly instead of making guesses in the dark

 

[Mustangbuc85]

Recently I got my steeda progressive sport lowering springs for my 2024 Mustang GT. As soon as I got them installed I’ve been having an issue I’m trying to chase. When I apply the brakes at 60-65mph I get a vibration/pulsation in the steering wheel. Only at those speeds. Even if I apply the brakes at 75 mph and I’m on the brakes till about 50mph the steering wheel won’t start to vibrate until 60-65mph and then go away at 50 which is odd to me. When i got my alignment after the springs were installed my passenger side caster was 8.0° and my driver side was 7.1° people told me to correct that and that could be the issue well I bought caster camber plates and corrected that now my caster is at 7.5° passenger side and 7.4° driver side and the issue still persists. My wheels are balanced I don’t think it would be my wheels. What could it be? Rotors?? If my rotors were warped wouldn’t it vibrate the steering wheel at any speeds and not only 60-65mph that’s what’s throwing me off. Other than that car drives straight as an arrow and doesn’t drift off and feels great. Any help is appreciated thanks
I also plan on tracking the car a few times this summer and this issue would be super irritating when cornering and braking

sounds like a brake pulsation. Nothing in those numbers would cause a vibration. Higher caster could cause a shake but not under braking.

 

[tj@steeda]

Let me engage our lead tech & see if he has any guidance he can provide.

Thank you,

TJ

 

[Mod Mustang Racing]

What else was done at the same time as the springs (ie new wheels/tires)?

 

[Stang24]

What else was done at the same time as the springs (ie new wheels/tires)?

Nothing else was done at the time of springs. A few weeks later I got caster camber plates installed.

 

[Mod Mustang Racing]

Nothing else was done at the time of springs. A few weeks later I got caster camber plates installed.

Gothca, and did the vibration occur before the CC plates were installed?

 

[Stang24]

Gothca, and did the vibration occur before the CC plates were installed?

Yes it occurred before the CC plates. Right after the spring install

 

[Mod Mustang Racing]

Strange... Have you checked all of the strut hardware to confirm everything is tight?

 

[Stang24]

Strange... Have you checked all of the strut hardware to confirm everything is tight?

Yes everything is tight and at spec

 

[Mod Mustang Racing]

Very strange, next best course of action would be have wheel/tires checked (which you already suggested)

 

[bgold87]

@Stang24 I just did my lowering springs and while reading about it I came across something I had never heard of, which is clocking bushings after lowering. Here's the thread I came across, but might be helpful for you in chasing this down since it sounds like you've hit all the obvious things.

https://www.mustang6g.com/forums/th...hose-bushings-after-lowering-your-s550.44129/

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