Updated at: 22-09-2021 - By: Lucas

A car transmission is a gear mechanism that connects the engine to the driving wheels of a vehicle. It consists of several different gears, and by changing which ones are engaged, the driver can select various speeds at which the vehicle will travel.

Most often, a standard car has three or four forward speeds, and sometimes an automatic or semi-automatic “shift” mode allows the driver to change gears without having to press any pedals or perform any other actions.

There are many different types of transmissions available for cars, including manual, automatic, manual-reverse, and continuously variable transmissions (CVT).

Each one has different benefits and drawbacks, so it’s important for the owner of the car to understand these options before making a final decision.

Manual Transmissions

Manual Transmissions

A manual transmission is simply one that you shift with your hands. This type of transmission is the most efficient and least expensive type of transmission to make. It’s also the only type that can be used in vehicles that are less than about 2,000 pounds because the torque from the engine isn’t great enough to force a heavy vehicle like a truck up a hill with any degree of efficiency.

A manual transmission can be a real bitch to learn how to drive. You have to learn when to use the clutch and when to release it. You have to know when to use the brake and when not to. It takes practice. However, once you learn how to drive a manual transmission, you will never want to drive anything else.

Once you master the art of driving a manual transmission, you will wonder how you ever survived without one. Manual transmissions are great for small, nimble cars and light trucks. They are not ideal for big, heavy-duty vehicles.


A dual-clutch transmission (DCT) is an automated manual transmission that uses two clutch assemblies instead of one. The DCT is the most common automatic transmission used in production cars today.

It was developed by General Motors in response to a request from the German manufacturer Porsche. The DCT has two dry clutches and a hydraulic torque converter. It can handle heavy loads with no problem whatsoever.

The DCT has three speeds, “Hi” for when you want to accelerate quickly, “Lo” for cruising and “Neutral” for when you need to stop or park the car. When you press the accelerator, one of the clutches engages, spinning the engine and the transmission gearbox.

As soon as the other clutch engages, the other gear in the transmission automatically engages. This means that you can get off the gas and coast to a stop without ever having to use the brake.


An “unsynchronized” transmission is one that doesn’t mesh properly with the engine’s ignition system. This causes the engine to run at a higher rpm than it would otherwise. The result is extra wear and tear on all of the engine’s moving parts, including the transmission. In the long run, this can cause major problems.

What you need to know is that there are several different causes of an unsynchronized transmission. Some of these causes are easy to identify, while others are not. If your mechanic can’t figure out what’s causing your transmission to be out of sync, then he or she will simply replace the entire transmission.

That may not be necessary at all. You may only need to have the synchronization procedure done on a couple of the gears in the transmission. It really depends on what’s causing the problem.

Synchronized/Constant Mesh

A synchronized transmission is a type of automatic transmission that has two or more gear ratios, allowing the driver to select the one he or she wants at any given time. Synchronized transmissions are usually found in large, heavy-duty trucks.

The main advantage of a synchronized transmission is that it improves acceleration by permitting the engine to run at a higher RPM for a longer period of time.

However, this also permits the engine to run at a much higher temperature, which means that it will operate more efficiently and last longer. This type of transmission is becoming more and more common in passenger cars and light trucks. These days, most cars and trucks come with a standard “stick shift” transmission.

However, if you want to get really serious about driving, then you should consider getting a car or truck with a synchronized transmission.



A single-clutch transmission (or “clutch-and-shift”) is an automated manual transmission that uses a mechanical clutch to engage and disengage the gears. The clutch is engaged when you press the gas pedal and the engine turns over.

The clutch releases when the engine is not turning over or when the gas pedal is released. This allows the vehicle to be driven in either automatic or manual mode. The advantage of this type of transmission is that it improves fuel economy and reduces engine wear.

The disadvantages are that it takes longer to shift gears, especially into a lower gear. This can be a problem if you are driving on a hill or on a long, flat straight away. Also, it is more difficult to drive in a manual transmission in the rain or snow.

If the road is wet, the clutch will eventually become clogged with mud and ice, which will cause the car to lose all power.


A preselector transmission is a “smart” transmission. It has been engineered to provide better fuel economy and lower emissions. It does this by automatically shifting gears when driving conditions change.

For example, if the road is smooth and you are traveling at a steady speed, the transmission will remain in the gear that gives you the best gas mileage. However, if the road becomes bumpy or rough, the transmission will automatically shift into a higher gear to maintain your speed. This allows you to get the most out of the power of your engine.

Preselector transmissions are not automatic. They have to be shifted manually by the driver. They are actually more like a manual transmission with a computer in the place of a mechanical clutch. This type of transmission has become the standard in cars that are sold in the USA.

Automatic Transmissions

Automatic Transmissions

An automatic transmission is simply a mechanical device that lets you shift gears without having to use your hands. It does this by using hydraulics to engage or disengage certain clutches. These clutches connect or disconnect the engine from the gearbox.

When they connect, they form a torque converter which transmits power from the engine to the wheels. When they disconnect, they allow the engine to spin freely. This frees up the driver to shift gears manually or automatically.

An automatic transmission is a great convenience. It allows the driver to focus on the road instead of the gearshift. However, there are some downsides too. The biggest downside is that it can cause a loss of power.

If you are driving on a hill, then the engine may not have as much power to begin with. That means, when the clutch engages, the engine may only have enough power to slowly turn the wheels.

This is not a big deal if you are only going down a gentle slope. However, if you are going up a steep incline, then this may be a deal breaker for you.

Sequential Manual Transmission

A sequential manual transmission (SMT) is a gearbox with a set of gears that are arranged in a series of “steps”. In other words, instead of having a continuous range of gears, there are distinct and separate groups of gears. This allows you to manually select which gear you want to use for any given engine speed.

For example, let’s say that you have a vehicle that has a 6-speed manual transmission. Let’s say that the 1st through the 3rd gears are the lowest gears and that the 4th through the 6th gears are the highest gears.

If you put your foot on the gas and want to go as fast as you can, you would put your foot on the gas and then shift into the 4th gear. That will give you the maximum engine torque (power) and allow you to get the most out of your engine. But, if you want to go a different pace, you could shift to 3rd gear and take it easy.

A sequential manual transmission is a good choice for a variety of reasons.

Semi-Automatic Transmissions

A semi-automatic transmission allows you to manually shift gears like a normal manual transmission, but it also has an “assist” mechanism that makes shifting much smoother and less of a chore. Basically, this mechanism does all the work for you when you press the clutch pedal.

It engages the gear you want to move into with the least amount of force possible, holds that gear while you let up on the gas pedal, then releases the hold on the gear automatically once you remove your foot from the brake pedal. This makes driving a lot more pleasurable.

The best feature of a semi-automatic transmission is that it allows you to manually shift gears like a normal manual transmission, but it also has an “assist” mechanism that makes shifting much smoother and less of a chore.

Basically, this mechanism does all the work for you when you press the clutch pedal. It engages the gear you want to move into with the least amount of force possible, holds that gear while you let up on the gas pedal, then releases the hold on the gear automatically once you remove your foot from the brake pedal.

Continuously Variable Transmission (CVT)

Continuously Variable Transmission (CVT)

A continuously variable transmission (CVT) is a transmission that can change gear ratios automatically depending on how hard you are pressing the accelerator pedal. This means that the engine speed will remain constant, regardless of how fast you are going.

This allows the engine to run at its most efficient RPM range. CVTs are especially useful for vehicles that need to be economical to drive, such as city cars, minivans, and sport utility vehicles. They also make these types of vehicles more fuel-efficient.

The two main types of CVTs are the hydraulic and the belt-driven. A belt-driven CVT works like this: There are two pulleys, one on each end of the belt. These pulleys are connected to the engine and the transmission respectively. As the engine turns, the belt turns. The movement of the belt causes the two pulleys to turn.

This in turn moves a series of gears inside the transmission which then selects the appropriate gear ratio.


A continuously variable transmission (CVT) is a popular transmission found on a variety of cars, including those from Honda, General Motors, Mitsubishi, Nissan, Toyota, and Volvo.

What kind of warranty does the car transmissions have?

The transmission comes with 180 days or 5000 miles warranty. This means if you are in any way dissatisfied with the transmission for any reason whatsoever, you can bring it back to the place where it was purchased and get your money back, no questions asked. However, we do not recommend this because it is very hard to find a good replacement for a CVT.

Which car transmission is the most expensive?

The most expensive transmission is the ZF 8-speed automatic that is found in the Audi S8/S8 Plus, Bentley Continental GT/GTC, and the Porsche Panamera.

How do I maintain the car transmission?

As long as you avoid racing or burnouts, you should never need to go into the transmission. However, if you do, there are some things you can do to help prevent damage. First, make sure you use the appropriate gear oil.

Second, check and replace the filter every month. Third, make sure the fluid level is at least half full. And finally, if you have a manual transmission, you should take it in for an inspection once a year. 

What kind of car is the manual transmission usually used for?

The manual transmission is usually used for sports cars, vans, trucks, SUVs, and most cars that are not luxury vehicles.

What are some common problems with manual transmissions?

The most common problem is that the transmission slips out of gear. This can happen when the clutch becomes dry or when contaminants get into the fluid. Contaminants can be anything from dirt to metal shavings. 


When you drive a car, you need to make sure that the transmission is in the right gear. If it is not, you will have a very hard time driving the car. And, if the gear is not in the right position, the engine will be working very hard which can lead to damage and a lot of problems.

This is really important and you should know how to check the transmission to be sure that it is in the right gear. 

Hope you like this article!