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    5. What is the purpose of overdrive ?
    What is the purpose of overdrive ?

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    +1  Views: 541 Answers: 2 Posted: 13 years ago
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      2 Answers

      To allow an automobile to cruise at sustained speed with reduced engine RPM, leading to better fuel economy, lower noise and lower wear.

      13 years ago. Rating: 2
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        HI  I ASSUME YOU ARE REFERRING TO A VEHICALE GEAR BOX IN WHICH CASE OVERDRIVE ARE EXTRA GEARS WHICH ALTER THE RATIOS ENGINE REVS TO SPEED THIS GIVES MORE SPEED FOR LESS REVS OR MORE MPG AS THE ENGINE IS WORKING SLOWER FOR A GIVEN SPEED

        13 years ago. Rating: 1
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