Thread: Whats the main difference between LSD and reg. trannys?
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Old Feb 18, 2007 | 11:26 AM
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TheOtherDave™
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Originally Posted by JoePoonani
I don't think the LSD trannys have different gear ratios. All the LSD does is limit the wheel spin on one wheel and it evens out the torque to both drive wheels.
You're absolutely right as far as the USDM ITR S80 / Y80 transmissions are concerned.

We kept the same 4.400:1 final drive from 97 to 01, while the JDM iTR S80 / Y80 upgraded to 4:785:1 final drive in 1998.

To the OP: As far the LSD itself... the ITR had a helical (gear-type) limited slip which is ulmately the most durable solution. There are other types of limited slip diffs with different characteristics, but to learn the basics... go search here.
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