Quote:
Originally Posted by tmntmn
anyone know how much NVH will be introduce if we run Solid Aluminum subframe bushing and Rear Differential Mounts?
|
Quote:
Originally Posted by Z K
Don't polyurethane bushings need to be lubed or else they squeak? I'm speaking from my experience with them on aftermarket sway bars.
I always avoid the polyurethane bushings for sway bars because of the squeaking. I've found harder rubber bushings better.
|
There is minimal to no NVH increase from the sub-frame bushing replacement. All new M's have this, including the more luxury oriented M5/M6 model. Changing differential bushings to Delrin, Poly or harder rubber will induce slightly more noticeable gear whine, but not harshness.
Poly bushings need to be serviced frequently with lubricant, or they will get noisy over time. Less servicing is required in the case of the sub-frame as not a ton of movement is present there compared to a sway bar, but those need lubrication as well. Polyurethane is not a service free item.