Re: What exactly is torque steer? - Saab General Bulletin Board - Saabnet.com
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Re: What exactly is torque steer?
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Posted by Camm [Email] (#191) [Profile/Gallery] (more from Camm) on Sun, 4 Dec 2005 06:36:41 Share Post by Email
In Reply to: Re: What exactly is torque steer?, jp, Sun, 4 Dec 2005 04:25:11
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There are a number of factors that can cause torque steer. From what I have read though, at it core, torque steer is the disproportionate application of torque through one wheel or the other(and the corresponding annoyances - getting pulled one way or the other). Saab specific elements aside, generally torque steer is caused by issues with uneven length halfshafts (front driveshafts), or in body geometry that causes one halfshaft to have an angle or bend in it relative to the other. It takes less effort to send power along an axle and through a tripod or CV joint that is straight in line than one that is flexed. So, imagine you are parked with one wheel on the street (straight joints) and one wheel up on a brick (flexed joints) - the wheel on the street would (in theory) be more likely to spin. Uneven length halfshafts exacerbate this phenomenon since by virtue of being unequal lenghts, en equal deflection will cause an unequal flexing or bending (in terms of the angle of the joint) and thus an unequal degree of resistance. Imagine a 1 foot long lever and a 4 foot long lever resting on a flat surface next to each other and both are raised an inch at their ends - the angle between the 1 foot lever and the flat surface will be greater than the 4 foot lever. In CV joint terms more angle = more resistance to turning.

Hope this helps

CW

posted by 24.194.152...

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