Now, with this established, we should know the principal behind how it works, any one care to share?
Pretty simple. The spider/side gears are cut fat at the base, and narrow at the top. This means that they WANT to separate, Spider gear from side gear as torque is applied. More torque, more side force.
This side force is transferred to the cones, which attempt to wedge themselves against the case. When this occurs, you have lockup and each axle will spin the same RPM.
If there is not enough force (including when the cones eventually bottom out in the case) the differential will, well, differentiate---good for corners, not so good for acceleration.
