Installed MS Lowering Springs

You're talking about the nut that holds the top mount in? That one wears?


No.

There is a bearing (Mazda probably refers to it as a "bushing") that allows the strut/spring asssembly to turn when you turn the car's steering wheel.

It's #8 in this picture:

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It seems to turn just fine when its on the lift. Hmm..its definitely an idea!


When on the lift, the bearing is unloaded and is likely not to exhibit symptoms even if it is shot.

Once the weight of the car is on it though, things change.

Also, a "failed" strut bearing can usually still physically turn without a problem. It just does it with a lot more noise and a bit less smoothness and precision (when loaded with the car's weight, that is).
 
Speed3 & ms springs

I've had the MS springs on my speed3 for about 10K miles. They do settle and get smoother as the miles go on (front more than rear). I had a clunking noise/pop upon initial installation but reseating the springs took care of that issue.

Aside from the initial issue the springs have been troublefree. I am also using the original OEM shocks.
 

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What I forgot to mention is, in light of everything that was going on, I decided to uninstall the springs lol. My intentions with the lowering springs were to eliminate the highway bounce and gain some improvements out of the suspension overall. What ended up happening is, it actually made the bouncing more obvious because you're lower to the ground now, so the bounces are still there, only it's louder and harder.

So, when we diagnosed what the problem was, I ended up re-installing my stock rear springs and had them re-install the stock front springs after they replaced the top strut mounts and bushings.

Riding around stock, it made me realize that the stock suspension is actually set up pretty well and that if I do decide to improve later, it will strictly be dampers.
 

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