'SimDriveline' from Mathworks

The Mathworks has developed SimDriveline for modeling and simulating
the mechanics of automotive and aerospace driveline and drivetrain
systems. It includes tools for modeling transmissions, gears, clutches, and
rotating shafts - all within the Simulink environment.

SimDriveline includes libraries of components for driveline systems,
standard transmission templates, and simple engine and tire models.
Models for most driveline configurations can be built using the library of
common gear configurations and library of dynamic elements, which
provides interfaces for modeling clutches, flexible shafts and torque
converters.

With a solution algorithm and user interface optimised for modeling and
simulating driveline mechanics, SimDriveline provides engineers with an
environment for efficient simulation of driveline systems.