There have been many, many posts about this. I just changed my manual to Redline D4 ATF. The car shifts much smoother though I'm not completely sure I understand the logic behind using ATF in a manual tranny.
A forum community dedicated to BMW E46, E90, and F30 owners and enthusiasts. Come join the discussion about M performance, turbo kits, engine swaps, builds, modifications, classifieds, troubleshooting, maintenance, and more!