Samsung is recalling nearly 3 million top - load washers — but not front - load machines — following reports of excessive vibration that could cause the lids to blow off. (npr.org)
It sounds like the setup you have now is causing the engine to operate at an RPM which is lugging slightly and causing excessive vibration. (mechanics.stackexchange.com)
An RS - R coil - over suspension improves ride quality, performance and comfort while reducing excessive vibrations from everyday driving, and it minimizes noises from suspension movements. (sema.org)