Transmission boxes are also known as gearbox which is the second part of the power in vehicles. The adjustment of speed and torque of the automobile depends on the gear system but also according to the load and road 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. They include the following, Spur gearboxes, helical gearboxes, bevel gearboxes, spiral gearboxes, hypoid gearboxes among others. Spur gearboxes are the mainly ordinary and straightforward transmission boxes available. The order in which their radial teeth are situated enables them to handle high gear ratios thus giving exceedingly high level of helpfulness. Spur gear systems have their shortcomings too. They generally tend to generate a lot noise and pressure, and that the reason why spur gearboxes are popularly used for low-speed and low-contact tasks where loud noise is endurable. 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 transmission boxes do work well with smaller gear ratios, conceivably, even more, better than helical gear systems. Helical gear systems often considered to be like spur gears however their teeth are not positioned in a crossway manner to the revolving shaft. These helical gears are typically placed at an angle, which is right angle position. They have less load capacity due to the parallel positioning of their teeth. Their teeth positioning, that is in helical gears, tolerate reticent engagement consequently resulting in the job that is drastically quieter than that of spur gearboxes.
The loading orders of helical gear boxes permit them to work with sophisticated torques even though their usefulness variety are alike. Helical gear systems have demerits as well, honestly the level of medial drive they employ, anxiety the usage of adequate oiled shaft bearings. Spiral gear systems are alteration of bevel types, and they present benefits like in helical transmission boxes systems with teeth that are linked progressively. The engagement of gear system bit by bit in spiral gear systems has caused a reduction of noise and smoothness in the system shafts. Thus the efficiency standards in spiral gear systems 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. They can as well handle high-speed ratio.