[Erasmus]

Why’s the sky blue? Why’s the grass green? How does PosiTrac on Plymouth work?

1. Dunno.

2. Dunno.

3. By means of a centrifugally actuated clutch which responds to the differential rotational rate of the two output gears when a certain level is exceeded by locking them together, and unlocking them when the differential torque falls below a certain level. Just a guess.

[ConservatismNow]

Well...there ya go. :P