There was a good article here that touched on the transmissions, alot of speculation on if Toyota would actually have the AT regeared since the ISF was an Eight speed. If they did, the AT will allow for more torque than the 6MT ever would. But the LSD is an ISF piece not an IS350 piece, that;s one reason why it was to easy for TOMEI.JP to tool up one for the car so quick.
http://kaizenfactor.wordpress.com/20...e-know-so-far/
http://www.tomeiusa.com/2010top/media/media-e.html
http://www.aisin-aw.co.jp/en/product...eup/index.html