Oh...
And that's for a ball differential. However, the principal is still the same.
A differential allows the axles to rotate at different speeds, thus aiding cornering: as the outside wheel has further to travel.
A fixed drive, as used on many touring cars, gives maximum power delivery.
On the (brilliant) Durango diffs, you use the viscosity of the oil to adjust the affect of the differential. Of course, having two differentials you can set the front differently to the back.
Julius.
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