My 540/6 has a somewhat clunky shifter, I'm sure with 136k the bushings are shot. My goal is to have it smooth, and easy to shift. I'm changing the fluid regardless to Redline or Royal Purple, but which will make my shifting smoother but still easy? My wife drives this car too, so I can't put in a SSK that takes two hands to shift, easy is good. New bushings in the stock one, SSK, or the shifter out of another BMW? Any ideas?