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Originally Posted by 08-G35s/6MT
Well there's fuel efficiency...  Other than that what's the point of having an 8 or 9 speed(particularly in the IS-F or SRT8 392) ? |
The more gears you have the better you can keep the car in the powerband.
You're mixing up transmission speeds with rear end ratios. More gears mean that the RPM's fall less with each shift, keeping the engine in its peak power RPM more often than a transmission with less gears would.
Rear end ratio just dictates the final drive ratio, and does not affect the spacing between the gears.