SD-1.15 Gearbox Apparatus

Most road vehicles are fitted with variable ratio gearboxes as a means of obtaining the best power application under the varying road conditions.

Fundamentally the gearbox consists of gear wheels of different sizes which may be engaged as required. The sliding mesh box, although it is still used on heavy commercial vehicles, is seldom found on modern cars, but its basic construction and operation are important from the Student’s point of view as it represents the basic layout from which most modern gearboxes have been developed.