* Spur gears are the most common type of gear used in rear axles. They are simple in design and easy to manufacture, but they are not as efficient as other types of gears. Spur gears are typically used in light-duty vehicles.
* Helical gears are more efficient than spur gears, but they are also more complex in design and more expensive to manufacture. Helical gears are typically used in heavy-duty vehicles.
* Hypoid gears are the most efficient type of gear used in rear axles. They are also the most complex in design and the most expensive to manufacture. Hypoid gears are typically used in high-performance vehicles.
In addition to these three main types of gears, there are also a number of other types of gears that can be used in rear axles, such as bevel gears and worm gears. The type of gear that is used in a particular vehicle depends on a number of factors, including the weight of the vehicle, the engine power, and the desired performance characteristics.
