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Thread: Any one who own mira auto 2006 ?

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    Default Any one who own mira auto 2006 ?


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    Quote Originally Posted by Xulfiqar View Post
    your concept of overdrive is mixed with shift patterns, Overdrive means that the transmission has a ratio of less than 1:1. overdrive in very simple terms is the 5th gear of a regular manual transmission car.

    In a regular auto with a planetary gearset a transmission has 3 speeds the third being 1:1 (like 4th gear in a regular manual), boxes with 2 planetary systems can achieve a further ratio of 0.5:1 or 0.7:1 - and after that the transmission can also have a lockup torque converter to reduce slip loss. Having overdrive has nothing to do how it shifts on a slope.
    plenatary type of gears? i ve only seen transmission of civic and that has a gear train with 7 clutches in between. i think autos are of two types. one ive just described and the other CVT.
    doesnt overdirve perform the same function as locking a car in just one gear?? how can the gear ratio change in over drive. i mean the gear ratio stays as it is as the number of teeth cannot change. neither the mating dia.
    -

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    okay lockup of the torque convertor is overdrive.
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    well i think i have 2006 model and i guess 2007 consumes less.
    thanks

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    so can u guys tell e which mechanic is best?in lahore?so i can asknhimm to check issue may be fuel injectors issue? or any thing elsE?

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    Quote Originally Posted by Retaliator View Post
    okay lockup of the torque convertor is overdrive.
    no lockup is completely different, Overdrive is actually a gear selection and has a ratio of less than 1:1, if the ratio is 0.5:1 - that means the engine spins 1 time for every 2 spins of the transmission output shaft. (the reason I said 0.5 or 0.7 was that different transmissions have different ratio setups)

    Lockup of the convertor is quite modern and in it there is a one way clutch inside the convertor that locks drive to the turbine. This is done to prevent slip losses of the convertor which are usually 10% in any case. This enhances fuel economy further but adds another shift system to the transmission, which itself has its pros and cons.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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