hmmm, someone told me (or did i saw it in the brochure) that stock E4 GSR comes factory-fitted with Helical LSD front |PLS| AYC rear!! is this true?! if not, then oh **** coz' i just replaced the front|PLS|rear gearboxes (including the transfer box) oil with Castrol LSX (Limited Slip Differential). will it do any harm then, since i may have used the wrong specs oil?! PLS HELPPP... evoboy, where are you?!