Automatic gearboxes

Automatic transmissions are technologically advanced drivetrain components that provide smooth gear changes without the need for manual operation. They make driving more comfortable and efficient, both in city traffic and on long journeys. At Global Parts, you'll find a wide selection of used car parts, including automatic transmissions, ideal for BMW , Audi , Mercedes , Volkswagen , Mini, and more. According to a detailed definition, an automatic transmission (AT) is a set of planetary gears, hydraulic clutches, a torque converter, and a control module (mechatronics). Its function is to automatically select gear ratios, which contributes to smooth driving and optimizes fuel consumption. Transmissions include conventional (hydraulic), CVT (continuously variable), DSG/S tronic (dual-clutch), and Tiptronic (with manual gear shifting).

What functions do automatic transmissions perform?

Automatic transmissions are complex devices that perform key functions in a vehicle's drive system: Automatic gear shifting – The gearbox automatically adjusts the gear ratios to driving conditions, ensuring optimal use of engine power. Improved driving comfort – Smooth gear changes eliminate the need for manual operation of the clutch and gear shift. Fuel economy – Modern automatic transmissions adjust gear ratios to optimize fuel consumption. Cooperation with other vehicle systems – The automatic transmission cooperates with safety systems such as ESP and cruise control, increasing stability and driving comfort. Examples of applications:

• In the Mini Cooper R50 5-speed Multitronic automatic transmissions were used, which allowed for smooth driving in city traffic.
• Mercedes Sprinter 906 was equipped with NAG1 (722.6) and 7G-Tronic (722.9) gearboxes, depending on the CDI engine version.
• IN Audi A6 Quattro 6- and 8-speed Tiptronic gearboxes were often installed, matched to four-wheel drive.

Why is it worth taking care of automatic transmissions ?

Malfunctioning or neglected automatic transmission maintenance can lead to serious problems with the vehicle's drivetrain. Typical symptoms include: Jerky shifting – This may indicate problems with the torque converter or transmission oil wear. Delays in shifting gears – Indicates possible damage to the mechatronics or hydraulic components of the gearbox. Noise and vibration – Mechanical problems in the gearbox can cause disturbing noises during operation. Gearbox Oil Leaks – Leaks in the gearbox can lead to reduced performance and serious damage. At Global Parts, we offer genuine used automatic transmissions that have undergone extensive quality testing, ensuring their durability and reliability.

Comparison table of popular automatic transmission types

Box type	Number of gears	Application (examples)	Characteristic
Classic AT	4–10	BMW, Mercedes, Audi	Durable, universal, used since the 1990s
DSG / S tronic	6–7	Audi, VW	Dual-clutch, very fast gear changes
CVT	Stepless	Mini, Nissan, Honda	Smooth acceleration, no classic gears
Tiptronic	5–8	Audi A6 Quattro, VW Passat	Automatic with manual selection option

How to choose the right automatic transmission ?

When choosing automatic transmissions, there are several key aspects to pay attention to: Vehicle-specific fit – Each drivetrain has its own specific technical requirements. At Global Parts, you'll find automatic transmissions perfectly matched to BMW , Audi , Mercedes , Volkswagen , Mini , and more . Technical condition – Used gearboxes should be free from mechanical damage and leaks, and their hydraulic and electrical components should be fully functional. Gearbox type – Select the appropriate gearbox type (classic automatic, CVT, DSG, Tiptronic) depending on the vehicle equipment. Compatibility can be confirmed by the vehicle's OEM number or VIN. For example, a 722.6 gearboxThe transmission used in the Sprinter 906 came in many variants, with different gear ratios and software. Therefore, matching it to the specific engine version and production year is always crucial.

Why choose used automatic transmissions ?

Used car parts , such as automatic transmissions, are a practical solution that allows you to save money while maintaining high quality. By choosing used automatic transmissions, you gain: Lower costs – Used crates are much cheaper than new ones, but offer just as high quality. Ecology – Recycling car parts supports environmental protection and reduces waste. A wide range – In our store you will find automatic transmissions for the most popular car brands.

How to take care of automatic transmissions ?

To ensure that automatic transmissions function reliably for a long time, it is worth following a few rules: Change the transmission oil and filters regularly according to the manufacturer's recommendations to ensure proper lubrication and cleanliness of the system. Avoid overloading the vehicle, especially when driving with heavy loads, to prevent the gearbox from overheating. Monitor any symptoms of malfunction, such as noises, vibrations or delays in gear shifting, and respond in a timely manner. If you need a replacement, you'll find the right used car parts at Global Parts that will restore full functionality to your drive system.

FAQ - most frequently asked questions about automatic transmissions

Question	Answer
What is the basic function of an automatic transmission?	This is a component of the drive system that automatically changes gear ratios, eliminating the need to operate the clutch and gear shift.
How is DSG different from a classic automatic gearbox?	DSG (Direct-Shift Gearbox) is a double-clutch gearbox that works faster and smoother than classic hydraulic transmissions.
What does Tiptronic mean?	Tiptronic is a type of automatic transmission that allows manual gear selection while maintaining full automatic operation.
What are the symptoms of automatic transmission failure?	The most common are: jerking when changing gears, delayed response, unusual noises or transmission oil leaks.
Are automatic transmissions economical to operate?	Modern gearboxes, such as the 8-speed ZF installed in BMW and Audi, reduce fuel consumption by 10–15% compared to older designs.
Which models does the Sprinter 906 gearbox fit?	The most commonly used gearboxes were 722.6 and 722.9, compatible with 2.1 CDI, 2.7 CDI and 3.0 CDI units in the years 2006–2017.
How to check if the gearbox fits the car?	The best method is to compare the OEM number or use the VIN number – this guarantees full compatibility with the drive system.

Summary: Automatic Transmissions at Global Parts Automotive Store

Automatic transmissions are technologically advanced components that ensure comfort and smooth driving in all conditions. By maintaining their technical condition, you can enjoy the reliability and efficiency of your vehicle for a long time. The Global Parts automotive store invites you to browse our wide selection of original used car parts . Whether you're looking for car parts for BMW , Audi , Volkswagen , Mercedes, Mini , and more, you'll find them at competitive prices. We strive to ensure every customer finds the right parts for their car, and if you have any questions or concerns about selecting the right components, we're happy to help! Please contact us – we're here to help! For more information and interesting facts, visit our automotive blog .