but there is different types of lsd in the r31 diffs too
my cousin has a s3 r31 sill and his diff is 4 pin type (or something like that - its got 4 thingies in there anyway) whereas some other r31 lsd's (and non) had only 2 pin

im not entirelly sure on this, can someone shed some light on this too?
it not 4pin, but something like that - its got 4 thingies in it instead of 2, the 4 one being stronger
and he found that out the hard way, cause he rebuilt it himself (new cones, shims, tightened it all up nicely again) and had some trouble with it