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Ok, so I understand how gears work and how a transmission works. I get what a gear ratio is between two gears only. How do they come up with the gear ratios for a transmission. Like 4.11 or 3.73? What exactly does this mean and how does it practically translate for me. For example, I have a 1988 744 Turbo with and AW71. I don't know the gear ratio. I want to put in a m46 or m47 and I was wondering how this would affect gas milage, acceleration, etc. If you could explain all this, it would be great.
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'Where's your common sense?' 'It left me when I was 5'
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