Comparison of the performance of an automatic transmission with a friction clutch and a fixed transmission. An explanation of why it works.
An automatic transmission with a friction clutch is probably the easiest way to make such a thing. However, many people do not believe that it is a real transmission and can really increase torque. Some think that the friction clutch consumes too much energy, others think that it is just a trick and under load, only the engine speed is reduced.
However, with proper torque design, this works and the transmission will actually increase the output torque at a low gear despite the use of a friction clutch.