The figure illustrates the arrangement of the individual components of the transmission for a passenger car and commercial vehicle.
Assuming the most common set-up consisting of a stepped transmission and drive axle transmission (front or rear axle), the relationship
Eq. 3-24
results for the engine speed neng and the speed of the driven wheels nW.
In this case, iT describes the manual transmission ratio and ir(f) the axle ratio of the driven rear or front axle.
Thus we receive for the vehicle speed v.
