car transmission

Parts of Car Transmission


Transmissions are important for any motor vehicle to keep the motor from destroying itself. If there is no gearbox system, the car engine would turn exorbitantly quick for primary security, meaning most engines would shake themselves to pieces or overheat

gear box

What is a Transmission?

Transmission is the process of the connection from your engine to the wheels. The transmission of power consequently gets the name. This power move includes various parts and requires the most extreme computations to be made to forestall energy loss. A manual transmission is relatively more complex to understand than automatic transmission.


What are the types of car Transmission with parts?

Car transmissions are classified into two types: manual and automatic. Manual transmissions were once considered the standard choice, automatic transmissions now prevail due to their equivalent functionality and superior reliability. Since drivers are not required to switch or shift gears as they change speeds or make adjustments as per the condition of the road. Their main focus is on driving alone and safely, and machines switch gears automatically and without any problem.

What is a Manual transmission?

With a manual transmission, the clutch should be locked to such an extent that the collar plate disconnects completely from the transmission gears. This is the reason while engaging in manual transmission and making a change starting from one gear and then onto the next, a car could appear to lag or jump.

The clutch ought to then be moved so the collar plate lines up faultlessly with the transmission gears you want to choose. Whenever done accurately, your car will quickly start to drive at your selected gear.

What are the different parts of Manual Transmission?

Below we will discuss the different parts of Manual transmission and how they work:-
(A.) Clutch:-

On the off chance that you’ve at any point driven a manual shift car, you’re presumably acquainted with the clutch. It’s the third pedal that you need to press to change gears. In any case, you probably won’t know precisely the exact thing the clutch does, particularly assuming that you’ve just driven cars with automatic transmissions. While the motor will turn continually, you don’t need the wheels continually spinning or turning.

One of the rotating or pivoting shafts will be connected or associated with the engine or power unit, this will be the driving part, while the other one is the rotating shaft, or driven part, which gives output to work. To allow or permit the car to both change speed and reach a standstill without turning off the engine, the connection or association between the wheels and engine should be temporarily broken.

gear box (2)

(B.) Flywheel:-
A rounded part is known as the flywheel which further sends torque from the engine to the clutch disc. The function of the flywheel is to store mechanical energy to adjust the engine so it continues to have great performance. The inertia of the flywheel counteracts and regulates fluctuations or variations in the engine speed, while also storing excess energy for intermittent utilization.


(C.) Input Shaft:-
This shaft is connected or associated with the flywheel by means of a clutch. It drives the countershaft gears at a similar speed as the engine.

input shaft

(D.)Counter Shaft:-
The countershaft houses a lot of varying gears that are driven by the engine through the input shaft. These gears otherwise called the countershaft gears are in constant mesh with the output shaft gears. Being in constant mesh implies that these gears are constantly connected with one another and rotate constantly.

counter shaft

(E)Output Shaft:-
An output shaft connects or associates the drive wheels to the gearbox in your vehicle. The output shaft is the part that carries the power of the transmission to the wheels. Contingent upon the speed you choose or select as well as the gear that the manual transmission sets, the output shaft will turn at the speed you choose further. This implies that the output shaft will rotate as indicated by the power transferred by the gears (pinion wheels).

(F.) Dog Clutches:-
Dog clutches are specialized claw couplings accessible for static or rotating operations. They are utilized to connect or interface an engine to an output shaft where the user needs to manually withdraw the drive between the two. It is mostly utilized in the constant mesh gearbox. Its functional capabilities are by mating a lot of consistently spaced teeth on one part of the clutch mechanism to a bunch of identical breaks on the other.

One of the plates has a series or progression of similarly spaced projections machined into its face. The other plate has an identically spaced series of like-sized breaks cut into its face. The cost or expense of the Dog clutch isn’t as much as the contact grip of comparative force limit and there is no slip or friction involved after the engagement of the clutch.

dog clutch
dog clutch

(G.) Synchronizers:-
Synchronizers are utilized to reduce or decrease gear wear and further diminish the noise level during any operation coming about because of the impact of the teeth while shifting or changing gears.


(H.) Selector Fork:

The Gear selector forks slide along the lay shaft of a manual transmission, as the clutch is held down, and select the gears (cog wheels), which are constrained by the stick-shift, by the driver. An actuating nose is fixed to the body to bestow the sliding movement along the stationary rod to the fork.

The body and prongs are shaped so that two forks with similar bodies and prongs can be mounted on a similar stationary rod and unquestionably somewhat overlaid toward sliding along the stationary rod.

selector fork
selector fork

(I.) Stick Shift:-

The driver utilizes a stick shift to manually switch the gears as they speed up and decelerate their vehicle. It is attached or connected to the gearbox and can be utilized to change gears. A car with a manual or standard transmission is at times referred to as a stick shift.

The car’s stick shift permits drivers to manually change ratios to speed up the vehicle. The transmission is connected to the stick shift, placed in the center of the car.

stick shift

What is an Automatic transmission?

An automatic transmission likewise features an automatic clutch. Rather than depending on human control, built-in sensors, processors, and actuators operate the clutch at the perfect moment in light of your ongoing speed, accelerator pressure, and different factors. This permits drivers to focus on different tasks on the road.

automatic transmission
automatic transmission

What are the parts of Automatic transmission?

(A.) Transmission Casing:-
A transmission casing is a metal or plastic enclosure that houses the interior components of a transmission. It is for the most part cylindrical and has a few openings for oil to flow in and out. The transmission casing safeguards the gears, bearings, and different components inside from damage. It additionally assists to dissipate heat generated by the transmission.

A transmission casing can be made utilizing different materials. It is generally riveted or bolted together, and the seams are sealed with gaskets to keep the oil inside.

transmission casing
transmission casing

(B.) Torque Converter:-
Automatic transmissions don’t have a clutch; all things considered, they have a torque converter. This replaces the clutch and carries out a similar function. Your transmission can’t shift gears while it’s actually drawn into the engine; any other way, it would snap gears. That is the reason in the event that you suspect that you could have a bad torque converter, you really want to quickly address it.

Your Torque converter permits your engine to remain running while at the same time disconnecting from the transmission, which might be compared to disconnecting your transmission to shift gears by depressing the clutch on a manual transmission.

(C.)Oil Pump:-
The oil pump inside an automatic transmission works very much like any other oil pump. It’s everything except an overly complicated part, but it is an essential and fundamental part of the system and is a rare example of parts in a transmission that will some of the time go wrong. These days, most automatic transmissions are equipped with advanced pumps that ensure optimal pressure maintenance inside the lubrication system.

Notwithstanding the way that there are a couple of issues related to the oil pump in an automatic transmission that prompts deficient grease of the transmission moving parts and temperature increase inside the unit.

(D.) Planetary Gear Set:-
Planetary gears have three sets of gears. The Sun gear is the main or principal gear and it is in the center of the planetary carrier. The subsequent set is the planetary gears. There are regularly at least three of these gears and the mesh between the sun gear and the ring gear.
The ring gear encompasses every one of the planetary gears with one ring, connecting or interfacing the entire system and bringing it all together. The system works by locking two of the three stuff gears all at once. Since each gear set is an alternate size, this provides you with a multitude of gear ratios by just locking different gears.

(E.) Hydraulic system:-
The hydraulic system gives the system a smooth running which works under the basis of typical hydrodynamics. The transmission hydraulic system has three principal purposes: to assist with controlling the shifting process of the transmission, lubrication of the transmission parts to forestall frictional damage and cooling of the transmission.

The fluid pressure in the transmission should be kept up consistently to stay away from any kind of damage. The tubes that convey the transmission fluid have two large external seals at the front and rear. The most normal sort of automatic transmission utilizes hydraulic power to change gears.

(F.) Clutch Packs:-
The Clutch pack within an automatic transmission consists of a few discs within a drum. In an automatic transmission if you want to work with gear shifts, a piston within the drum compresses the clutch pack together utilizing oil pressure, which further locks the parts of the clutch pack together. An automatic transmission has a planetary gear set, a set of brands, a set of three wet-plate clutches, a hydraulic system, and a large gear pump.

(G.) Output Shaft:-
The output shaft is the part that carries the power of the transmission to the wheels. Contingent upon the speed you choose or select and the gear that the automatic transmission sets, the output shaft will turn at the speed you decide. When your transmission has completed its inner enchantment, its power is delivered to the driveshaft, which thus supplies power to the hubs. Be that as it may, your transmission’s output shaft drives the drive shaft.

(H.) Brake Band:-
The Brake band is a steel belt with friction material stuck to the internal surface. They permit the engine RPM to fall in line with the gear ratio prior to release, which allows a smoother shifting of gears. Brake groups work similarly to drum brakes, with a piston pressing the band around a drum.

(I.) Oil Pan:-
It is more like your engine has an oil pan on the base, and so does your transmission. It holds the excessive transmission liquid (oil) for the oil pump to pull from when it’s required. It normally has a transmission fluid filter attached or connected, either inside or outside.

It’s one of the most essential and fundamental parts of your transmission, and yet it’s one of the parts presumably going to require repairs. The gaskets around the oil pan frequently leak transmission fluid and need to be replaced.

(J.) Valve Body:-
The engine of the car has an ECU, and the automatic transmission has a valve body. This part coordinates or facilitates all the pressure from the oil pump to all of your transmission parts to get the best outcomes. Without the valve body, there is no chance transmission fluid will work and there will be no indications where it needs to go. In the case of an automatic transmission, it’s controlled or constrained by sensors, which work right with the transmission control module (TCM) to control where all of the liquids are sent.

(K.) Transmission Control Module:-
A Transmission Control Module, or TCU, is a computerized or mechanized part of a car’s automatic transmission. It monitors and controls all parts of the transmission’s performance and can frequently be repaired or supplanted without updating the whole transmission. The TCU regulates various functions of automatic transmission.

It monitors the fluid pressure and temperature, It further changes the shift points and timing as well as controls the torque converter lock-up. It can likewise determine problems to have the transmission and report them to the driver.

(L) Computer:-
In most automobiles today, a computer controls the transmission functional capability so all of the vehicle systems can cooperate to accomplish fuel economy and execution. Up to 30 sensors read every one of the different factors, for example, vehicle speed, engine temperature, engine RPM, and so on, and that control the shifting of the transmission to ensure that the optimal shift points are utilized.


The parts of Car transmissions play a vital part in how your car functions. It assists with ensuring that the car moves without a hitch and in an efficient manner. Assuming that you’re generally having problems with your automatic transmission, it’s vital to make a move. Every part attached or connected to the engine plays an essential part in the whole power transmission process.

The total set-up of the system for transferring power and energy from the engine to the wheels assists in maintaining or keeping up with the cruising with speeding of the vehicle with practically no sort of obstacles or disturbance. At times, you can supplant the transmission of a vehicle.

Nonetheless, it is critical to consult a mechanic to ensure that the replacement is done correctly, Whenever done in an incorrect manner, you could damage the car and wind up spending more cash over the long haul.

Also, read the Transmission system

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