What is the construction and purpose of automatic transmissions?

Automatic transmissions are drivetrain assemblies mounted between the engine and subsequent drivetrain components. Their typical construction includes a housing, a gear set, a hydraulic system, electronic controls, and a torque converter or clutch packs. The transmission's task is to select the gear ratio according to driving speed and engine load without manual shifting by the driver.

What are automatic transmissions used for?

Automatic transmissions are used for smooth torque transfer and automatic gear shifting while driving. In practice, they affect the comfort of starting, accelerating, and driving in traffic jams, as well as cooperation with vehicle electronics. Without a properly functioning transmission, there may be delays in drivetrain response, jerking, or reduced vehicle performance.

What is the construction and function of a torque converter?

A torque converter is a hydrodynamic element connecting the engine to the automatic transmission. It consists of a housing, a pump impeller, a turbine, and a stator, and in many versions, also a lock-up clutch. Its function is to smoothly transfer drive during starting and to dampen sudden load changes.

How to check the compatibility of an automatic transmission with a vehicle?

The most reliable method is to compare the OEM number, transmission code, interchangeable numbers, and vehicle data via VIN. It is also worth verifying the fuel type, engine version, drivetrain type, and associated accessories, e.g., the controller or selector. This information helps avoid incompatibility during installation.

What symptoms indicate problems with an automatic transmission?

The most common symptoms include jerking during gear changes, delayed starting, noise, vibration, and transmission fluid leaks. In some cases, an emergency mode or failure to shift into a selected gear may also occur. Such symptoms should be checked against the condition of the oil, controls, and hydraulic components.

How to prepare an automatic transmission for installation?

Before installation, check the compatibility of markings, the condition of the housing, mounting points, connectors, and associated accessories. It is also good practice to check seals, oil cooling, and control elements. This makes installation smoother and reduces the risk of mismatch.

Automatic gearboxes

At Global Parts, we offer a wide selection of original used car parts, including automatic transmissions for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Our automatic transmissions undergo quality control to ensure you receive a top-quality product.

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BMW X3 F25 F26 35dX F30 F31 F32 335dX 435dX Automatic Gearbox GA8HP70X WARRANTY

Product currently unavailable

Part no. 8623595

BMW F30 F33 320d N47N Automatic Auto Gearbox 8623595 GA8HP45 WARRANTY

€379.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7576175

BMW E90 E91 E92 325i N52N N53 Automatic Auto Gearbox GA6HP19Z WARRANTY

€379.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 9487561

Automatic Gearbox BMW F10 528i F20 125i F30 328i N20 GA8HP45Z 8618877 WARRANTY

€541.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7556047

BMW E60 E87 E90 E91 120d 320d 520d M47N2 Automatic Gearbox GA6HP19Z WARRANTY

€332.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7638363

BMW F10 520i F20 125i F30 328i N20 Automatic Gearbox GA8HP45Z 8632475 WARRANTY

€569.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7853545

BMW F80 M3 F82 F83 M4 F87 M2 Twin Clutch Gearbox Drivelogic GS7D36SG WARRANTY

€1,139.95

Free delivery: Jul 9 – 14

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Part no. 8614198

BMW X3 F25 20dX N47N Diesel Automatic Gearbox 8614198 GA8HP45X WARRANTY

€1,187.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8638262

BMW F20 F21 M135i F13 640i N55 Automatic Gearbox 8638262 GA8HP45 ZAJ WARRANTY

€503.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7853550

BMW F80 M3 F82 F83 M4 F87 M2 Twin Clutch Gearbox GS7D36SG 7853550 WARRANTY

€1,424.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7630997

BMW E81 E87 LCI E90 E91 120i 320i N43 Automatic Transmission Gearbox WARRANTY

€237.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7581580

BMW X5 E70 3.0sd M57N2 Diesel Automatic Gearbox GA6HP26Z 7581580 WARRANTY

€759.95

Free delivery: Jul 9 – 14

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Part no. 7564644

BMW Z4 E85 N52 2.5i 2.5si 3.0i Automatic Gearbox GA6HP19Z 7564644 WARRANTY

€474.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8623514

Automatic Gearbox BMW F10 F11 520d Diesel N47N 8623514 Auto GA8HP45Z WARRANTY

€569.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7640118

BMW F20 116d 118d F30 316d 318d N47N Automatic Gearbox 7640118 GA8HP45Z WARRANTY

€503.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7571673

BMW E81 E87 E90 116i 316i N45N N43 Automatic Gearbox 7571673 7592525 WARRANTY

€332.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 5B4D475-1

BMW U06 220i B38N Automatic Gearbox JVT GN7Q40RC 5B4D475 WARRANTY

€1,424.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7566911

BMW E92 N52N E93 N53 325i Automatic Auto Gearbox GA6HP19Z WARRANTY

€332.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8601701

Automatic Gearbox BMW F30 F31 F34 320i 420i Petrol N20 8601701 GA8HP45Z WARRANTY

€522.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8740643

Automatic Gearbox BMW X3 G01 X4 G02 30dX B57 GA8HP75X 8740643 WARRANTY

€1,757.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 9455371

Automatic Gearbox BMW X3 G01 X4 G02 20dX B47D GA8HP51X 9455371 WARRANTY

€1,377.95

Free delivery: Jul 9 – 14

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Part no. 8678661

Automatic Gearbox BMW F20 F30 F31 LCI 120d 320d B47 8678661 GA8HP50Z WARRANTY

€759.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8665291

Automatic Gearbox BMW F30 F31 LCI F32 320iX 420iX B48 GA8HP50X 8665291 WARRANTY

€807.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8687818

Mechatronics Automatic Gearbox BMW F10 F11 535d F13 640d N57Z GA8HP70Z 8687818

€341.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7581582

BMW X5 E70 3.0d M57N2 Automatic Auto Gearbox GA6HP26Z 7576111 7581582 WARRANTY

€664.95

Free delivery: Jul 9 – 14

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Part no. 7582257

Automatic Gearbox BMW E81 E82 E87 LCI 123d Auto GA6HP19Z 7582257 WARRANTY

€759.95

Free delivery: Jul 9 – 14

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Part no. 5A05D99

Automatic Gearbox BMW G20 G21 X3 G01 X4 G02 M40dX GA8HP76X 5A05D99 WARRANTY

€1,567.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8651263

BMW F20 F21 LCI F22 F23 B47 Automatic Gearbox GA8HP50 8651263 WARRANTY

€1,177.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7547898-2

BMW E60 E61 E63 E90 E91 330i 530i 630i N52 Automatic Gearbox Empty GA6HP19Z

€237.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7590130

BMW 5 Series E60 E61 LCI 520d N47 Automatic Gearbox GA6HP19Z 7590130 WARRANTY

€569.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8695808

Automatic Gearbox BMW X1 F48 20i Mini F54 F60 B46 B48 GA8F22AW 8695808 WARRANTY

€2,564.95

Free delivery: Jul 9 – 14

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Part no. 7853560

BMW F87 M2 F82 F83 M4 LCI S55 Dual Clutch Gearbox GS7D36SG 7853560 WARRANTY

€1,614.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8617113

BMW X3 F25 20dX Diesel N47N Automatic Gearbox GA8HP45X 7623367 WARRANTY

€1,424.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 9487562

Automatic Gearbox BMW F30 F31 F32 F34 320i 420i Petrol N20 GA8HP45Z WARRANTY

€455.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8744948

BMW X3 G01 X4 G02 M40dX B57 Automatic Gearbox GA8HP75X 8744948 WARRANTY

€1,472.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7627527

BMW F20 118d N47N Automatic Gearbox 7627527 GA8HP45Z WARRANTY

€427.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 9485370

BMW G11 G12 LCI 730i G32 630i B48D Automatic Gearbox GA8HP51Z 9485370 WARRANTY

€2,089.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7630949

Automatic Gearbox BMW X1 E84 18dX 20dX Diesel N47 GA6HP19X 7630949 WARRANTY

€569.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7563294

BMW E60 E61 E90 E91 325i 525i Petrol N52 Automatic Gearbox Auto 6 Speed WARRANTY

€379.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8615258

Electric Gearbox BMW F45 225xe Mini F60 ALL4 B38X 8615258 GE1F45GK WARRANTY

€474.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7647344

BMW X3 F25 F30 F31 N47N 320dX Automatic Gearbox GA8HP-45Z 7647344 WARRANTY

€1,044.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8609951

BMW X1 E84 Automatic Gearbox 18dX 20dX Diesel N47N GA8HP45X 8609951 WARRANTY

€379.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7642301

Automatic Gearbox BMW F30 F31 320i Petrol N20 GA8HP45Z 7638365 WARRANTY

€522.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8638730

Automatic Gearbox BMW F30 F31 335i F32 435i N55 GA8HP45 8638730 WARRANTY

€997.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7853540

BMW F80 M3 F82 F83 M4 Twin Clutch Gearbox Drivelogic GS7D36SG 7853533 WARRANTY

€949.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7566249

BMW E90 E91 E92 E93 325i N52N Automatic Auto Gearbox 7581877 GA6L45R WARRANTY

€712.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8742387

BMW X3 G01 X4 G02 M40iX B58D Automatic Gearbox GA8HP51X - Z7Q 8742387 WARRANTY

€1,044.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8681113

Automatic Gearbox BMW F20 F21 116i 118i F30 316i N13 GA8HP45 8614210 WARRANTY

€550.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7556840

BMW E65 E66 740i N62N Automatic Gearbox GA6HP26Z 7556840 WARRANTY

€1,044.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7576117

BMW E60 E61 E62 LCI N62N Automatic Gearbox GA6HP26Z 7576117 WARRANTY

€1,120.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7525323-1

BMW X5 E53 3.0i M54 Automatic Gearbox Transmission A5S 390R-YZ 7525323 WARRANTY

€759.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 5A13192-1

BMW X5 F15 Mechatronics Module 25dX Automatic Gearbox Drive GA8HP45Z 5A13192

€284.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7590134

BMW E90 E91 E92 325d M57N2 Automatic Gearbox GA6HP19Z 7590134 WARRANTY

€664.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8687007

BMW F45 F46 B48 220i Automatic Gearbox GA8F22AW 8685607 WARRANTY

€2,564.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7643203

BMW X3 F25 F30 F31 330dX N57N Automatic Auto Gearbox GA8HP70X 7643203 WARRANTY

€712.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 9504849

BMW X3 M F97 X4 M F98 Automatic Gearbox Transmission 9504849 GA8HP76X WARRANTY

€2,089.95

Free delivery: Jul 9 – 14

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Part no. 7581583

BMW E60 E61 LCI 530d M57N2 Automatic Gearbox GA6HP26Z 7581583 7576114 WARRANTY

€807.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8601719

BMW F30 F31 320ix N20 Automatic Gearbox GA8HP45X 7647310 8601719 WARRANTY

€341.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8617277

BMW F10 528i 530i N52N N53 Automatic Gearbox GA8HP45Z 7606587 WARRANTY

€1,044.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7556842

BMW E65 730d M57N2 Automatic Auto Gearbox 7556842 7556541 GA6HP26Z WARRANTY

€617.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 5B15258

BMW F70 F74 F78 M235iX B48R Automatic Transmission DCT GD7S40FG 5B15258 WARRANTY

€2,849.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7642069

Automatic Gearbox BMW X3 F25 20dX Diesel N47N 7642069 Auto GA8HP45X WARRANTY

€1,139.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7590128

Automatic Gearbox BMW E90 E91 E92 335d M57N2 GA6HP26Z 7590128 7631055 WARRANTY

€854.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7630973

BMW E90 E91 E92 E93 325i N53 Automatic Gearbox GA6HP19Z 7630973 WARRANTY

€569.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7647840-1

Gearbox Oil Pump BMW F20 F21 F22 F30 F31 F32 Automatic 0501327294 GA8HP45Z

€66.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7642246

BMW F20 F30 116d 118d 316d 318d N47N Automatic Gearbox GA8HP45Z 7642246 WARRANTY

€427.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7647858

BMW F01 F02 Mechatronics Drive Control N52N N54 Petrol GA6HP19Z 7647858

€840.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 5B12601

BMW U06 X1 U11 B38X Automatic Gearbox DCT GD7Q30KG 5B12601 WARRANTY

€2,469.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7547898-1

BMW E60 E61 E63 E90 E91 N52 Automatic Transmission Parts GA6HP19Z 7547898

€256.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 9456607

BMW G11 G12 G30 G31 B48X Automatic Gearbox GA8P75HZ 9456607 WARRANTY

€1,994.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7636216

BMW X3 F25 N47N 20dX Automatic Gearbox Transmission GA8H-P45X 7636216 WARRANTY

€1,282.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8617111

BMW F12 F13 640i N55 Automatic Gearbox 7619329 GA8HP45Z WDK WARRANTY

€569.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 9423614

Automatic Gearbox BMW F45 F46 218d B47 GA8F22AW 9423614 WARRANTY

€3,229.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8679086

Automatic Gearbox BMW G30 530e G11 740e B46X B48X GA8P75H 5A2D52 WARRANTY

€1,519.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 5A04BC4

BMW X3 G01 X4 G02 20iX B48C Automatic Gearbox GA8HP51X 5A04BC4 WARRANTY

€1,329.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7616614

BMW F01 F02 F03 760Li N74 V12 Automatic Gearbox GA8HP90Z 7616614 WARRANTY

€2,849.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 9423619

BMW X1 F48 X2 F39 20d Mini F60 B47 Automatic Gearbox GA8F22AW 8488919 WARRANTY

€3,039.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7644022

BMW X5 E70 LCI E71 40dX N57S Automatic Gearbox Auto GA8HP70X 7644022 WARRANTY

€1,139.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 1439112

BMW X5 Series E53 Automatic Transmission Gearbox Cooling Heat Exchanger

€23.95

Free delivery: Jul 9 – 14

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Part no. 7630958

Automatic Gearbox BMW E81 E87 LCI E88 123d Auto GA6HP19Z 7590122 WARRANTY

€408.95

Free delivery: Jul 9 – 14

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Part no. 7858800

BMW M3 F80 M4 F82 F83 M2 F87 N55 Automatic Gearbox DCT GS6-45BZ 7858800 WARRANTY

€1,282.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7616518

Automatic Gearbox BMW F10 F11 520d Diesel N47N 7616518 Auto GA8HP45Z WARRANTY

€617.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7640094

BMW F20 116i 118i Petrol N13 Automatic Gearbox GA8HP45Z 7640094 WARRANTY

€778.95

Free delivery: Jul 9 – 14

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Part no. 5A04AA2

BMW G20 G21 G22 G42 B48 Automatic Gearbox GA8HP51Z 5A04AA2 WARRANTY

€1,044.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7543089

BMW E87 E90 E91 118i 318i 129HP Automatic Gearbox GA6HP19Z 7556043 WARRANTY

€474.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8648922

BMW F20 F21 LCI F23 116d B37 Automatic Auto Gearbox 8648922 GA8HP50Z WARRANTY

€902.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 7568551

Automatic Gearbox BMW E81 E87 LCI 116i N45N Auto GA6L45R 7568551 WARRANTY

€664.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8469956

Automatic Gearbox BMW X3 M F97 X4 M F98 S58 GA8HP76X 8469956 WARRANTY

€2,279.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8609949

BMW X1 E84 Automatic Gearbox 20iX 28iX Petrol N20 GA8HP45X 8609949 WARRANTY

€664.95

Free delivery: Jul 9 – 14

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Part no. 8638282

BMW F30 F31 F32 F36 320ix 420ix N20 Automatic Gearbox GA8HP45X 8632473 WARRANTY

€569.95

Free delivery: Jul 9 – 14

If paid before 14:00

Part no. 8487260

BMW X3 F25 F30 F31 330dX N57N Automatic Auto Gearbox GA8HP70X 8648661 WARRANTY

Product currently unavailable

Part no. 8486836

Automatic Gearbox BMW X3 F25 X4 F26 20dX Diesel B47 8638291 GA8HP45X WARRANTY

Product currently unavailable

Part no. 7646106

BMW F01 F10 F30 F32 330d 430d 530d 730d N57N Automatic Gearbox GA8HP70Z WARRANTY

Product currently unavailable

Part no. 8487133

BMW F40 M135iX F44 M235iX B48E Automatic Gearbox GA8G45XAW 8487133 WARRANTY

Product currently unavailable

Part no. 9426264

Automatic Gearbox BMW F20 F21 116d Diesel B37 GA8HP50Z 8678657 WARRANTY

Product currently unavailable

Part no. 7623321

BMW F10 F11 520d Diesel N47N Automatic Gearbox Auto GA8HP45Z 7623321 WARRANTY

Product currently unavailable

Part no. 7572483

BMW E90 E91 Diesel 335d M57N2 Automatic Auto Gearbox GA6HP26Z 7572483 WARRANTY

Product currently unavailable

Part no. 7586032

BMW X3 E83 LCI 3.0si N52N Automatic Gearbox GA6L45R 7572194 WARRANTY

Product currently unavailable

Part no. 7539078

BMW X5 E53 Diesel 3.0d M57N Auto Automatic Gearbox GA6HP26Z 7539078 WARRANTY

Product currently unavailable

Showing 1-99 of 247 products

Top-class automatic transmissions – smooth driving in all conditions

Innovative solutions in automatic transmissions - reliability that gives you an advantage on the road

Automatic transmissions are technologically advanced drivetrain components that ensure smooth gear shifting without the need for manual operation. They make driving more comfortable and efficient, both in city traffic and on long journeys. In the Global Parts automotive store, you will find a wide selection of used car parts, including automatic transmissions, ideal for brands such as BMW, Audi, Mercedes, Volkswagen, Mini, and others. According to the detailed definition, an automatic transmission (AT) is an assembly of planetary gears, hydraulic clutches, a torque converter, and a control module (mechatronics). Its task is to automatically select gear ratios, which affects driving smoothness and optimizes fuel consumption. Notable types include classic transmissions (hydraulic), CVT (continuously variable), DSG/S tronic (dual-clutch), and Tiptronic (with manual shifting capability).

What functions do automatic transmissions perform?

Automatic transmissions are complex devices that perform key functions in a vehicle's drivetrain:

Automatic gear shifting – The transmission adjusts gear ratios to driving conditions, ensuring optimal use of engine power.
Improved driving comfort – By shifting gears smoothly, it eliminates the need for manual clutch and gear lever operation.
Fuel economy – Modern automatic transmissions adjust gear ratios to optimize fuel consumption.
Integration with other vehicle systems – The automatic transmission works with safety systems such as ESP or cruise control, increasing stability and driving comfort. Examples of applications:
The Mercedes Sprinter 906 was equipped with NAG1 (722.6) and 7G-Tronic (722.9) transmissions, depending on the CDI engine version.
The Audi A6 Quattro often featured 6- and 8-speed Tiptronic transmissions, matched to the all-wheel-drive system.

Construction and purpose of automatic transmissions

Automatic transmissions are assemblies mounted between the engine and the drivetrain, responsible for transmitting torque and selecting gear ratios without driver intervention. A typical construction includes a housing, a converter or clutches, a gear set, hydraulic controls, and electronics. When selecting a unit, the OEM number, transmission type, fuel type, and interchangeable numbers available in the product offer are of great importance.

Comparison of popular automatic transmission types

Transmission type	Construction	Operating characteristics	What to check before selection
Classic AT	Torque converter, planetary gears, hydraulics, and control	Smooth gear shifting, good compatibility with more powerful engines	OEM number, transmission code, engine version, and mounting type
DSG / S tronic	Dual clutch, mechatronics, automated gearbox	Fast response and short shift times	Controller compatibility, accessories, and software version
CVT	Continuously variable system with belt or chain and hydraulic control	Very smooth acceleration without classic gear steps	Fuel type, variant code, and compatibility with half-shafts
Tiptronic	Hydraulic automatic with manual gear selection function	Combines automatic convenience with driver control	Vehicle version, selector control, and drivetrain compatibility

Why is it worth taking care of automatic transmissions?

Malfunction or neglect of automatic transmission maintenance can lead to serious drivetrain problems. Typical symptoms of failure include:

Jerking during gear changes – May indicate problems with the torque converter or worn transmission fluid.
Delays in gear shifting – Point to possible damage to the mechatronics or hydraulic transmission components.
Noise and vibration – Mechanical problems in the transmission can cause disturbing sounds during operation.
Transmission fluid leaks – Leaks in the transmission can lead to reduced performance and serious damage. At Global Parts, we offer used automatic transmissions that have undergone detailed quality tests, ensuring their durability and reliability.

The role of mechatronics and associated components

Mechatronics is an integrated module combining electronic control with transmission hydraulics. It is responsible for gear selection, operating pressure, and communication with other vehicle systems. For parts such as mechatronics 6hp19, it is worth comparing the OEM number, variant designation, and compatibility with the controller and wiring harness, as well as checking related components such as transmission control units and transmission sensors.

How to choose the right automatic transmission?

When choosing automatic transmissions, you should pay attention to several key aspects:

Matching the vehicle model – Every drivetrain has its specific technical requirements. At Global Parts, you will find automatic transmissions perfectly matched to BMW, Audi, Mercedes, Volkswagen, Mini, and others.
Technical condition – Used transmissions should be free from mechanical damage and leaks, and their hydraulic and electrical components should be fully functional.
Transmission type – Choose the appropriate transmission type (classic automatic, CVT, DSG, Tiptronic) depending on the vehicle's equipment. Compatibility can be confirmed based on the OEM number or the vehicle's VIN. For example, the 722.6 transmission used in the Sprinter 906 came in many variants, differing in gear ratios and software. Therefore, matching it to the specific engine version and production year is always crucial.

Selection by markings, accessories, and vehicle version

When selecting elements for a version such as ga6hp19z, it is good to verify the transmission code, fuel type, and compatibility with the selector and half-shafts. An automatic transmission is used to transfer drive in a strictly defined configuration, which is why interchangeable numbers and vehicle equipment are also important. When choosing, related categories such as torque converters and oil coolers and lines are often helpful.

Why choose used automatic transmissions?

Used car parts, such as automatic transmissions, are a practical solution that allows for savings while maintaining high quality. By choosing used automatic transmissions, you gain:

Lower costs – Used transmissions are significantly cheaper than new ones but offer equally high quality.
Ecology – Recycling car parts supports environmental protection and reduces waste.
Wide selection – In our store, you will find automatic transmissions for the most popular car brands.

Practical symptoms and verification scope before installation

The torque converter is an intermediary element between the engine and the transmission that enables starting and smooth torque transfer without a classic clutch. When vibrations, delays when starting, or irregular gear changes occur, it is worth checking not only the transmission itself but also the accessories and mounts. When choosing an element like BMW E90 320d transmission, it is crucial to compare the OEM part number, housing type, connectors, and compatibility with drivetrain accessories.

How to take care of automatic transmissions?

To ensure automatic transmissions work reliably for a long time, it is worth following a few rules:

Regularly change the transmission fluid and filters according to the manufacturer's recommendations to ensure proper lubrication and system cleanliness.
Avoid overloading the vehicle, especially when driving with heavy loads, to prevent transmission overheating.
Monitor any symptoms of malfunction, such as noise, vibration, or delays in gear shifting, and respond to them in a timely manner. If a replacement is needed, at Global Parts you will find suitable used auto parts that will restore full functionality to your drivetrain. The selection process can also be supplemented by the guide Why it is worth buying used transmissions and engines – facts instead of myths, which describes practical rules for verification by VIN and OEM number.

FAQ

Question	Answer
What is the construction and purpose of automatic transmissions?	Automatic transmissions are drivetrain assemblies mounted between the engine and subsequent drivetrain components. Their typical construction includes a housing, a gear set, a hydraulic system, electronic controls, and a torque converter or clutch packs. The transmission's task is to select the gear ratio according to driving speed and engine load without manual shifting by the driver.
What are automatic transmissions used for?	Automatic transmissions are used for smooth torque transfer and automatic gear shifting while driving. In practice, they affect the comfort of starting, accelerating, and driving in traffic jams, as well as cooperation with vehicle electronics. Without a properly functioning transmission, there may be delays in drivetrain response, jerking, or reduced vehicle performance.
What is the construction and function of a torque converter?	A torque converter is a hydrodynamic element connecting the engine to the automatic transmission. It consists of a housing, a pump impeller, a turbine, and a stator, and in many versions, also a lock-up clutch. Its function is to smoothly transfer drive during starting and to dampen sudden load changes.
How to check the compatibility of an automatic transmission with a vehicle?	The most reliable method is to compare the OEM number, transmission code, interchangeable numbers, and vehicle data via VIN. It is also worth verifying the fuel type, engine version, drivetrain type, and associated accessories, e.g., the controller or selector. This information helps avoid incompatibility during installation.
What symptoms indicate problems with an automatic transmission?	The most common symptoms include jerking during gear changes, delayed starting, noise, vibration, and transmission fluid leaks. In some cases, an emergency mode or failure to shift into a selected gear may also occur. Such symptoms should be checked against the condition of the oil, controls, and hydraulic components.
How to prepare an automatic transmission for installation?	Before installation, check the compatibility of markings, the condition of the housing, mounting points, connectors, and associated accessories. It is also good practice to check seals, oil cooling, and control elements. This makes installation smoother and reduces the risk of mismatch.

Summary: automatic transmissions at the Global Parts automotive store

Automatic transmissions are technologically advanced components that ensure comfort and driving smoothness in all conditions. The Global Parts offer includes used components matched to cars from brands such as BMW, Mercedes, Audi, and others, and you can rely on the OEM number, interchangeable numbers, and vehicle data when choosing. We invite you to contact us – we are here to help you! For more information and interesting facts, we also invite you to visit our automotive blog.

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