While I respect your opinion and experience with Fiesta ownership, I have to disregard some of your review. Firstly, 600 miles isn't nearly enough time or mileage to give a fair evaluation of a rear motor mount. Most mounts require at least 1000 miles of break-in, or even more in some cases before they will calm down. Secondly, I experience NONE of the vibration like you are experiencing. Everything was shaking? When? At idle or past that?
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May I ask a question?
Do you have the strut tower brace installed?
Do you have the 6 point or any other brace installed under the vehicle?
Do you have the BC Coilovers installed?
I agree with your assessment that the Breedt piece is very well constructed and in my opinion a really nice design. The fact that you can switch out the bushing, by hand, and just pop in a stronger one or replace the other one is really nice.
The reason for the questions, is I am trying to see if we are comparing apples to apples.
I absolutely believe it was installed correctly for no other reason than I didn't install it.
It will only go on one way.
We did actually take the bushing out and make sure we didn't have the 60 installed. So we know we have the softer one installed.
Perhaps, I have other things installed that are contributing to the RMM being overly aggressive and harsh and causing severe vibrations at idle.
I have no harsh feelings about Breedt. They make really nice stuff and I include the RMM as one of those nice pieces. It is just frustrating about all of the misinformation, what works, what doesn't work all based on opinion and personal preference. Unfortunately there is nothing you can do about it, it is the nature of the forums. So if you could lets use your experience, and help me figure out what I did to the car, that could be causing the Breedt RMM to cause such a bad vibration. As Sourskittle said, it may just be the Breedt is too stiff compared to the others and it is just the nature of this particular product. Maybe the Cobb is softer, but I now have it, I don't want to sell it, I want to make it work as it was designed, but if there is something else that is causing the problem maybe I can fix it.