Someone care to explain the Torsen diff talk? He said that it's not 'mechanical' which is incorrect, and that the 'R' may have a 'mechanical' diff. WTF is he talking about?
I can only think of the following diff types (excluding open):
Viscous (Nissan likes these, but I hear their response is weird.)
Torsen (which is, I believe, a trademark for a geared/helical LSD, and I'll group locker-types in here too)
Clutch-pack (I believe Posi on the domestics are clutch packs, as are the non-TTR Mk3 Supra turbos, and aftermarket ones like Kaaz and OS Giken)
Electronic types like Honda's ATTS on the SH Prelude and Ferrari's e-diff, which are similar to electronic torque-biasing center diffs in the STI, etc...
But I flipped through the Lexus site, checking out the IS and they mention this:
Quote:
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Pre-Torque Semi Limited Slip Differential
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http://www.lexus.ca/lexus/experience...5C2M&year=2012
Plus the mention that the Aisin trans is in use in existing Toyota products makes me think that they come from the IS250. 6-speed manual is available and it has a rear 'semi limited slip' diff.
Thoughts?