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thispage shows one of their lsd but i dont know if it is the one in the 8. nissan owned part of the company at one point but has sold its interest to someone called GKN.
this page inmplies that it is /was going to be used in the focus svt but i dont have confirmation on that.
edit: i couldn't find their home page
The Tochigi Fuji LSD in the RX-8 is similar to the one used in the Mazdaspeed Protege. It is supposed to provide "highly-improved handling" and was designed for sporty cars.
It is a conical ring torsen type (torque sensing), not the Viscous coupling lock type (speed sensing) which I believe MikeW prefers.
From Mazda: "The sports-dedicated LSD installed in the RX-7 had a high TBR at 2.6 - 3.0 and was designed for exceptionally skilled drivers. For the RX-8, Mazda developed a torque-sensing Super LSD to support enjoyable and safe driving over a wider range of conditions, from everyday maneuvering to forceful driving-at-the-limit. Super LSD has a low TBR of 2.0, which assures predictably smooth vehicle behavior during fast cornering and on low friction road surfaces, and improves stability during the off-the-line acceleration and straight-running".
Mazda sports cars have mainly used Torsens. The Mazdaspeed Protege uses a torsen from Tochigi Fuji also, RX-7s used torsens, Miatas used to use the cheaper viscous type from 1990 - 1993 but had the more effective torsens as an option after 1994.
The RX-8s torsen LSD will work great with the stability control offered in the "Sports package" since it can apply braking on one or more wheels.
Interestingly enough GKN (the German maker of the Viscolock that MikeW likes) spent about 40 million US to acquire Tochigi Fuji.
Originally posted by babylou With 167k mi that clutch type LSD in the Corolla is now acting as an open diff because the clutch plates are surely worn out.
It's probably nowhere near as tight as it used to be, but it's still working well enough for me to tell just by the way it drives (especially in the rain :D). I have driven RWD cars with open diffs and another Corolla with LSD and mine most definitely still has LSD behavior.
The clutch in my Z28 is at 98k, I'm so hoping it gets me into the summer so I don't have to worry about replacing it before the RX-8 hits the dealer. Now I have to stop treating the car like a sports car so it gets me through until then without costing me tons of money.
I once had a 9-month old clutch delaminate and shatter in my RX-7. That was the shortest clutch lifespan I'd ever heard of on a street car. Learned an expensive lesson, though - get the good stuff the first time 'round.:D