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Changing Rear Gear Ratio


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Does anyone have any knowledge of the availability of lower gear ratio sets (3.90's or so) for the GS430? Are there any shops in the midwest (Kansas, Missouri, Indiana) that change rear gears for the GS 430's?

Thanks for any help,

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I found the answer to my own question. Rod Millen Motorsports (RMM) has a complete rear-end unit for sale that has 3:76 gears and is a direct replacement unit for the factory one. This includes the complete differential unit. Should increase performance quite a bit. RMM claims a .4 decrease in 0 to 60mph times.

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