1. flying haggis

    An 80-year-old video perfectly explaining how differentials work.

  2. B

    Quaife vs Wavetrac Differentials

    My friends recently fitted one to his BMW and seems to be very happy, don't know how they compare but the price seems pretty good. Apparently for street use, they offer better grip in low traction conditions, which most of us face every day. Wavetrac® Differential - A torque biasing...
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