As a result, gearbox is necessary to manage output pace & torque. As per the necessity of your automobile, we could obtain various speeds or torque with the assistance of the gearbox. The final Motors Hydra-Matic turned the primary mass-manufactured automatic transmission subsequent its introduction in 1939 (1940 model year). https://marcotdhii.blogerus.com/56297406/top-guidelines-of-gearbox-auto