Question about 1991 Ford Club

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1991 ford laser kf 5 door

Thank you for your previous information - most help full , it is a 3 speed auto and is running at about 4100 - 4200 rpm's per 100kl do you have any idea's as to the problem?

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  • alltypefab Nov 04, 2008

    no - no over drive we have had the car for approx 9 months and has always rev ed hard - the mechanic said it's ok - but obvious it is not

  • alltypefab Nov 04, 2008

    no - no over drive we have had the car for approx 9 months and has always rev ed hard - the mechanic said it's ok - but obvious it is not

  • Cee Jai Bernard
    Cee Jai Bernard May 11, 2010

    1000 RPM difference.. i've never heard of a difference that big...Has it always been like that? also does your car have overdrive?



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I asked my family mechanic and he said with an automatic transmission if there is a variance in rpm its usually an issue with the torque converter. Basically it's a closed housing with a fluid and two discs with fins on either end. on disc is connected to the engine one is connected to the transmission. as the the disc on the engine side spins, it starts to spin the liquid inside the housing which then spins the disc connected to the transmission. That's how an automatic car is able to have low rpms at a red light and not move unlike a manual transmission that uses a clutch. But unlike a manual where there is a physical connection between the engine and transmission. This is where you can loose power and waste rpms. My mechanic suspects that this is where the issue may be. He said that if the fins on one or both blades are damaged, it may reduce the amount of power transfer which in turn wold be higher engine rpms or basically the issue you're having. Hope that helps,

Posted on Nov 04, 2008


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