What Is a Transmission?

WHAT IS A TRANSMISSION?

Sometimes power transmission between the engine and wheels must be interrupted.

The clutch performs this task. The more the clutch pedal is pressed, the more power transmission between the engine and wheels is cut.

When the clutch is fully depressed, rotational power transmission is completely interrupted.

WHAT ARE THE TYPES OF TRANSMISSIONS?
There are three types of transmissions: manual, semi-automatic, and automatic.

WHAT IS A MANUAL TRANSMISSION?
Manual transmission is the most widely used type today. In a manual gearbox, gears are changed by hand by the driver.

The clutch assembly is used much more in manual transmissions. When changing gears manually, the driver must first press the clutch to cut power from the engine to the wheels.

After pressing the clutch, the gear is changed and the clutch is released. Once released, power at the new gear ratio is transmitted to the vehicle's drivetrain.

WHAT IS A SEMI-AUTOMATIC TRANSMISSION?
Semi-automatic transmission, also known as DSG (Dual Shift Gearbox), was first used in racing cars.

When it was noticed that semi-automatic transmissions improved vehicle performance, they began to be used in regular cars as well.

Semi-automatic vehicles have two input shafts.

The first handles 1st, 3rd, and 5th gears, while the second handles 2nd, 4th, and 6th gears.
The latest semi-automatic transmissions support up to 7th gear and are built dry —

hence the name dry transmission; they do not require fluid changes.

WHAT IS AN AUTOMATIC TRANSMISSION?

As the name suggests, automatic transmissions change gears automatically.

When a gear change is needed, the transmission and torque converter handle the shift.

Compared to manual transmissions, automatic gearboxes provide much more comfortable driving.

An automatic gearbox is one where the driver does not use a gear lever or clutch pedal and gear changes happen automatically.

There is no clutch pedal, and gear changes are performed automatically by the transmission control unit.

AUTOMATIC TRANSMISSION FLUID CHANGE
Transmission fluid is critical in automatic vehicles. It must be heat-resistant and durable because bearings, separators, and bushings wear over time; worn components can cause clutch pack failure. Choose quality fluid — poor fluids often foam, and foaming reduces hydraulic conductivity, which can cause slipping during shifts.

The transmission can sometimes cause more dangerous situations than the engine, and sometimes far greater expense.

With proper fluid maintenance, you avoid these problems and extend transmission life.

Fluid service should be performed at appropriate intervals.

In Turkey, fluid is typically changed around 40,000–50,000 km depending on conditions; check your owner's manual for your vehicle.

Manual fluid changes by transmission specialists do not fully achieve the intended result. Fluid in the pan cannot be completely drained, so the transmission is not fully cleaned.

For this reason, professional workshops use transmission fluid exchange machines.

Launch automatic transmission fluid exchange machines make fluid changes much easier.

With this equipment, fluid changes on automatic vehicles are straightforward.

Previously, complete fluid replacement was not possible and residue remained in the sump; with the CAT 501-S Automatic Transmission Fluid Changer the entire process can be done automatically with no fluid residue left behind.

This device extends transmission life and ensures thorough internal cleaning.

Please call us for more information;
0850 755 02 30