Using your example to get to a 60km/h limit, the stock 4.388 final drive will be quicker because you can reach close to 60km/h using just 1st gear. With a shorter final drive, you have to shift into 2nd. Same if you were going up to 100km/h, you can just barely get there in 2nd gear with the 4.388 but you would need 3rd gear with a shorter final drive.
Then to me final drive sounds that its not really that great unless you want the for higher speeds?
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