Only the gears on the layshaft and diff gear are used when calculating internal ration the idler gear i just for joining the gears together and determaning the way the wheels and motor spin. The idler gear with 90 teeth or 9 teeth wouldnt make a diffrence to the internal ration as the iddler gear just transferres the power. Its very difficult to exsplain.
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Ashley Williams
I always thought by 2013 we would have flying cars, but we have got blankets with sleeves!
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