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I have installed the Powerflex Gearbox black series and it makes a great job although it increases NVH substantially which is annoying somehow (mostly bright buzzing).
This weekend I will try to reduce the noise level in the car and need to understand the purpose of the big stock bolt in the middle of the transmission mount. Does anyone know what this bolt is doing other than being fixed between the upper and the lower part of the transmission mount?
thanks
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