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Originally Posted by torquemada

the automatic in the IS-F has eight gears

http://en.wikipedia.org/wiki/Lexus_IS_(XE20)#IS_F_SPDS

I´m pretty sure they mean IS 250 or IS 350

If the auto is from ISx50, this car fail so bad. It's slow(lag), and unresponsive. From what I have heard, the 6spd auto is based on 8spd from IS-F. The one similar if not the same as 2013 GS.
Manual one is based off IS300's tranny, but I think the one in FR-S/BRZ is upgraded version.