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Using Is300 3.7 Final Gear In Is200?

SpOcK

By SpOcK
in Engine & Transmission

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SpOcK Community Regular

SpOcK

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I'm fascinated about the idea to use the IS300 final gear ratio of 3.7:1 (compared to the std 4.3) in my IS200. As my car is T/C'd, under boost the gears seem too short, and especially the 1st gear is next to useless. With F/I the long gears won't be such a handicap, rather an advantage... With longer final drive I wouldn't have to go for 3rd gear to hit 100km/h (or 62mph as you are used to... :winky: ), and the engine wouldn't rev through the 1st gear in milliseconds as it does now. (Well, not atmo, as my engine is still being rebuild as some of you know... :lol: )

So, how would I source one of these IS300 final ratios, and if I do find one, how do I calibrate the speedo to show the right speed?

Hope those in the know step forward! :unsure:

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