Originally Posted by stressdoc
e-diff is the most absurd mislabel ever. It is brakes and power cuts. All E9xs have this, it's termed DSC/DTC. The post 03/08 version is programmed differently. The later version is not what I want because it is more invasive and apparently does not completely turn off some braking functions; IMO the pre 08 version works fine with all stages of DSC/DTC. Quaife or other LSD is great regardless of which version you have.
It's just horrible. Cuts power more or less consistently when driving hard in the first three gears, on a track the car feels as if it hicupped continuously. I can't imagine who would really want this if you have the choice of getting a real torsen-diff. It may not be bad for the daily granny driver, but once you start adding power to your car or driving it a bit harder, you'll find it quite annoying. That is in fact THE reason why a Quaife is no. 1 on my wishlist right now.