Gearbox which can be called transmission box is an element of power in auto. Actually its primary purpose is to adjust the speed and torque of vehicle according to the variety of highway and cargo condition. Gear system helps to change the speed of the vehicle into torque as it ascends to the hills, which are very import to the cars to. Gearbox can also be defined as the torque converter. There are numerous types of gear systems in the automobile industries. In the auto industry, there are a good number of gear systems which include, helical transmission boxes, spiral gear system, bevel transmission boxes, hypoid gear systems and spur transmission boxes. Spur gear systems are the largely reasonable and direct gearboxes available. The way their radial teeth are positioned, allow them to handle high gear ratios, giving extremely high level of efficiency. Spur gearboxes have their demerits also. They normally be likely to come up with a lot of pressure and sound, and that’s why they are often desirable used for low-impact and low-speed works where loud noise is acceptable. Bevel gearboxes consist of cone-style teeth and crossing shafts that hearten versatile movement in the area straight between these shafts. They can manage a considerable amount of pressure due to the feature axes and how they are fitted with care. Bevel gear systems have lesser effectiveness levels than spur and helical transmission boxes. The bevel gearboxes do work correctly with lesser gear ratios, perhaps even more efficient than their helical counterpart. Helical gearboxes are like spur gears though their teeth are not placed crossways to the revolving axis. However, these gears are locked at an angle, most commonly right angle. They have less load capacity due to the parallel positioning of their teeth. Their teeth positioning also allow for modest engagement hence ensuing in a job that is significantly quieter than that of spur transmission boxes.
The loading orders of helical gear boxes permit them to work with sophisticated torques even though their usefulness variety are alike. These types of transmission boxes have limitations too. The standard of medial push they utilize, require the use of enough oiled shaft bearings. Spiral transmission boxes are adjustment of bevel gear system, and they give benefits equal to helical gearbox systems with teeth that join bit by bit. Due to slowly engagement of the gear system, the process results in smoother and a reduced amount of noisy gear shafts. Hence their efficiency level is very high. Hypoid gear systems resembles the spiral bevel kind though their compel axes only do not contact. They work well with right angle drive shaft, they produce less noise, and they are stronger than spiral bevel transmission boxes. High-speed ratio can be handled with this system.