The buzzing is the gear shift linkage There is a modification somewhere to the shift mechanism which can be required to fix it, but it's too late to dig it out now
However I think in most cases, it indicates worn engine mountings. In my case, changing the tranmission mounting bush and the easier of the two top dogbone bushes fixed it for me.
However I think in most cases, it indicates worn engine mountings. In my case, changing the tranmission mounting bush and the easier of the two top dogbone bushes fixed it for me.