From memory, there's a difference between clutch type and gear type LSD's and I have no idea which type BMW fit.
Try jacking the whole back end up so both wheels are off the ground, then turn one wheel and observe the other. If it turns in the same direction you definitely have a clutch type LSD fitted, if it turns in the opposite direction you either don't have an LSD or you have a gear type one fitted.
If it's the latter, drive the car onto a verge so one rear tyre is on a loose surface and the other on tarmac, then accelerate away, if the tyre on the loose surface spins you have no LSD, if it doesn't spin then you do have an LSD of some type.
|