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cibergypsy said:I read on Paul Frère's book "The Porsche 911 Story" that an LSD would not be compatible with PSM and was, therefore, not offered on the 996 with PSM. Nevertheless, don't the European 997s that have the -20mm sports suspension and LSD also have PSM? I was under the impression they did and that would make this LSD available in the North American PET catalog a plausible possibility, wouldn't it?
Towards the end of the 996 production life they managed to finally make PSM pseudo-compatible with rear LSD in the 911 40th anniversary edition wich had it standard, but its a special rear LSD with lower locking rates. Lower than the GT3 or GT2s, and lower than the 1999 Carrera2's that had LSD as an option since they did not have PSM standard yet(those that had TC and not PSM, could opt for a rear LSD as an option).
Now in the 997S with -20mm suspensions its standard as well but with 22%/27% locking only again since it needs to be compatible with PSM. However its not a bolt-on part, its realtionship with PSM seems to be complicated and its only a factory option and only for the -20mm spec, and has always been a factory only option for the 996/997 that coulp opt for it from factory.
I have never heard of anyone being able to install it post factory on the 997 (wether US or EUro spec), much less get any type of approval or warranty by Porsche, since this is not an option, not even in Europe. This is why we are suspicious of what you are being told at the dealer. For example, the Champion dealiership has been offering ts clients the -20mm suspension for US cars for some 2 years now, but while it includes the shocks/springs/swaybars, it never included the rear LSD.