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Differential gear set with adjustable driveshaft gear ratio and
friction losses     The Differential block represents a
differential gear that couples rotational motion about the
longitudinal driveshaft axis to rotational motion about two
lateral or side axes. The differential is composed of a simple
gear and two symmetric sun-planet bevel gears. The simple gear
comprises a differential crown gear attached to the carrier of
one of the sun-planet bevel gears, plus a bevel gear attached to
the driveshaft. For model details, see Differential Gear Model.
Any axis can be the input. In normal use, the longitudinal
driveshaft is the input, and motion, torque, and power flow out
through the side shafts. In general, the output axes have
different angular velocities. The longitudinal motion is divided
by the drive gear ratio that you specify and then split equally
between the two lateral shafts.  Differential Crown Location
Relative to Center-line Side Axes Rotati