[AP328]

I have a GT3 with an LSD. The factory units are known to fail and a symptom of that failure on the track or when driven hard on the road is a tail wag and lack of stability on acceleration when coming out of a corner. When driven normally on the street, the failed differential was not obvious. But once changed to a working LSD (Guard Transmission), the tail wag noted during track sessions and very spirited street driving is gone, replaced by a very smooth corner exit.