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VY SV6 Do not exist.. Its either a VY 's' pack or a VZ SV6 & VZ SV6s should all have LSD standard, this is part of what makes it soo SV6'ish as opposed to Executive..
i alway thought that if you jacked the rear wheels off the ground and turned one wheel towards the front, if the other wheel turns in the same direction it is an LSD if it turns the other way it is not...? Come on there has to be a mechanic here some where.....:yeah: