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Poly bushings and NVH ???


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Poly bushings are not new to me but In every car I have owned Im mindful of where I install them. I purchased a kit a decade ago and ready to install but with the fantastic condition the factory bushings were in I wanted to see what everyone thinks. So the list of OEM isolators / bushings staying are the torque tub isolators, rear pumpkin mounts, motor and trans mounts are also rubber. The mounts I'm on the fence about are the large rear crossmember to body mounts, I don't want to hear / feel the ring and pinion. 

I will say this that I seem to be more in tune with noise and vibration then most that ride in my cars, why I have RV mufflers on my mustang. I used to pore my own poly mounts so I could add some compliance in an axis to reduce suspension noise/shock. I searched and could not find a single complaint about ride quality after doing all bushings.

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I have stedebani bushings in my car, the black 85A durometer ones (softer).  They were purchased probably closer to two decades ago.  I believe these are the same as what MKS sells now.  The ride is really good.  I don't really have any complaints. It's a little more 'noisy' than stock but this is also combined with coilovers, camber plates, etc.     There use to be complaints about the 95A durometer that stedebani use to sell but it was mainly on their motor mounts.  I don't recall anyone ever complaining about the bushings.   

If you chose to install them, grease them good.  I also added jerk fittings to all of the sleeves in order to be able to re-grease without teardown in the future (although haven't had to do so to date).   But...if yours are good, I'd consider just leaving them go.   It's not the easiest job to do.  Take a look at techboy's recent thread on the trials he went through recently with this.

 

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