Torque Steer after replacing Driveshaft?!!!

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fwd's will always torque steer to the side which has a longer shaft?

and what do you mean 'winding up'??

The usual claim is that a longer driveshaft "flexes" somehow contributing to different torque at the tyre.

If there were any truth to this, then, like a spring, it will reach maximum deflection after a given ammount of time and then remain deflected until the torque is removed. The time constant of an imbalance caused by this mechanism would be TINY.