stock Trans Gear Ratio

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When emailing Tony with AstroPerformance he told me that the overdrive gear ratio is based off the main cluster gear set ratios. So, if you went with the 2.59 first of the g-force T5 gear set it uses the stock fifth gear but changes its final overdrive ratio to 0.59:1. They now have a set of heavy duty fifth gears. They are mainly for racing in fifth gear with high engine power levels and they have numerically higher values.