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.

More information

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Audi A4 B8 A5 8T 2.0 TDI Automatic Gearbox Multitronic NYM 0AW300048F WARRANTY

€2,232.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 09D300039E

VW Touareg Audi Q7 4L Cayenne 9PA 3.0 TDI Automatic Gearbox 09D300039E WARRANTY

€712.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B5300060R

Audi S4 B8 S5 8T 3.0 TFSI Quattro Automatic Gearbox PWW 0B5300060R WARRANTY

€2,042.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 02E300052T

Audi A3 8P 2.0 TDI CBAB Automatic Gearbox LTE S-Tronic 02E300052T WARRANTY

€892.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 02E300050J-1

Audi A3 8P 2.0 TFSI CAWB Automatic Gearbox S-Tronic KNC 02E300050J WARRANTY

€1,234.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B5300056G

Audi A6 C7 A7 4G 2.8 FSI CHVA Quattro Automatic Gearbox NSE 0B5300056G WARRANTY

€1,757.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B5300057B

Audi A4 B8 A5 8T 3.0 TDI Quattro Stronic Gearbox 7 Speed MNJ 0B5300057B WARRANTY

€1,804.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0D5300038Q

Audi RS5 F5 2.9 TFSI Quattro Automatic Gearbox 8 Speed RZN 0D5300038Q WARRANTY

€1,899.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B5300061J

Audi RS4 B8 4.2 V8 FSI CFSA Quattro Automatic Gearbox PXL 0B5300061J WARRANTY

€1,899.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B5300056K

Audi A6 C7 Allroad 3.0 TFSI Quattro Gearbox S-Tronic NSJ 0B5300056K WARRANTY

€1,899.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 02E300054H

Audi A3 8P 2.0 TDI CFGB Automatic Gearbox S-Tronic MSU 02E300054H WARRANTY

€949.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B5300056C

Audi S4 B8 S5 8T 3.0 TFSI CGWC Quattro Automatic Gearbox NSC 0B5300056C WARRANTY

€2,374.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 02E300058C

Audi TT Mk2 8J 2.0 TFSI CESA Automatic Gearbox DSG NLX 02E300058C WARRANTY

€1,472.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 02Q300045E

Audi TT 8J 2.0 TFSI BWA Manual Gearbox 6 Speed KZU 02Q300045E WARRANTY

€398.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 02E300015FX

Audi TT 8N 3.2 BHE Quattro Automatic Gearbox S-Tronic GYU 02E300015FX WARRANTY

€949.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0BK300039N

Audi A7 4G 3.0 TDI CVUA Quattro Automatic Transmission PPE 0BK300039N WARRANTY

€2,089.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B6300036A

Audi S5 8T 4.2 V8 FSI CAUA Quattro Automatic Gearbox LEJ 0B6300036A WARRANTY

€949.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0D5300038N

Audi S4 B9 S5 8T 3.0 TDI Quattro Automatic Gearbox RVM 0D5300038N WARRANTY

€3,039.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0GC300014B-2

Audi S3 8V 2.0 TFSI DNUE Quattro Automatic Gearbox UAQ 0GC300014B WARRANTY

€1,329.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0GC300013J

Audi Q3 F3 2.0 TDI Automatic Gearbox S-Tronic UDC 0GC300013J WARRANTY

€1,234.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0BK300038N

Audi A8 D4 4H 3.0 TDI CTBA Quattro Automatic Gearbox NWJ 0BK300038N WARRANTY

€1,424.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 09L300038N

Audi A4 B7 3.0 TDI BKN Quattro Automatic Gearbox HYJ 09L300038N WARRANTY

€1,329.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B5300056D

Audi A4 B8 A5 8T 2.0 TDI CGLC Quattro Automatic Gearbox NSA 0B5300056D WARRANTY

€2,042.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0AM300048

Audi A3 8P 1.4 TSI Automatic Gearbox S-Tronic LXA 0AM300048 WARRANTY

€1,234.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B5300056T

Audi S5 8T 3.0 TFSI CGWC Quattro Automatic Gearbox NUS 0B5300056T WARRANTY

€2,327.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 02E300016D

Audi TT 8J 2.0 TDI CFGB Quattro Automatic Gearbox PQS 02E300016D WARRANTY

€1,044.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0GC300044E

Audi A3 8V 2.0 TDI DFGA Automatic Gearbox 7 Speed DSG UAW 0GC300044E WARRANTY

€1,899.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 09E300039PX

Audi S8 D3 5.2 FSI V10 BSM Quattro Automatic Gearbox KZK 09E300039PX WARRANTY

€455.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 02E300050NX

Audi A3 8P 1.8 TFSI BZB Automatic Gearbox S-Tronic KNG 02E300050NX WARRANTY

€1,329.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0GC300014B-1

Audi A3 8V 2.0 TFSI DNUE Quattro Automatic Gearbox UAQ 0GC300014B WARRANTY

€1,234.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B6300035N

AUDI S5 8T 4.2 V8 CAUA Quattro Automatic Gearbox KWR 0B6300035N WARRANTY

€1,472.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0CK300041Q

Audi A4 B9 3.0 TDI Automatic Gearbox Transmission PHR 0CK300041Q WARRANTY

€1,500.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 09L300042F

AUDI A6 C6 4F Allroad 2.7 TDI Quattro Automatic Gearbox LWD 09L300042F WARRANTY

€636.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0CK300044P

Audi A4 B9 2.0 TFSI CVKB Automatic Gearbox DSG SJH 0CK300044P WARRANTY

€1,709.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0CJ300042B

AUDI A5 F5 2.0 TFSI Quattro Automatic Gearbox S-Tronic SUY 0CJ300042B WARRANTY

€2,279.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0CJ300041T

Audi Q5 FY 2.0 TFSI Petrol Quattro Automatic Gearbox DSG SUW 0CJ300041T WARRANTY

€1,187.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B6300036D

Audi A5 8T 3.0 TDI CCWA Quattro Automatic Gearbox LMK 0B6300036D WARRANTY

€997.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0C8300036RX

Audi Q7 4L 3.0 TDI Quattro Automatic Gearbox MHP 0C8300036RX WARRANTY

€1,234.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0BK300038H-1

Audi A7 4G 3.0 TDI CGQB Quattro Automatic Gearbox NVF Parts Set Kit 1087437252

€949.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B5300058S

Audi A5 8T 2.0 TFSI Quattro Automatic Gearbox DSG PJW 0B5300058S WARRANTY

€1,510.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 09D300039KX

VW Touareg 7L Audi Q7 3.0 TDI 4X4 Automatic Gearbox KQZ 09D300039KX WARRANTY

€664.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 09D300038Q

Audi Q7 4L 3.0 TDI Quattro Automatic Gearbox JXX 6 Speed 09D300038Q WARRANTY

€569.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0CK300047D

Audi A4 B9 A5 F5 2.0 TDI Automatic Gearbox S-Tronic UMP 0CK300047D WARRANTY

€2,849.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B5300038K

Audi A5 8T 3.0 CDUC Quattro Automatic Gearbox S-Tronic NUR 0B5300038K WARRANTY

€1,804.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 02E300051R

Audi A3 8P TT 8J 2.0 TFSI Automatic Gearbox S-Tronic LQZ 02E300051R WARRANTY

€788.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0CK300043B

Audi A4 B9 A5 F5 2.0 TDI Automatic Gearbox S-Tronic SJS 0CK300043B WARRANTY

€2,469.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 01J300058G

Audi A4 B7 2.0 TFSI Automatic Gearbox Mutitronic HHD 01J300058G WARRANTY

€1,804.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 086300042R

Audi R8 4.2 FSI V8 Quattro BYH R-Tronic Gearbox KBC 086300045R WARRANTY

€5,699.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 01J300062G

Audi A4 B7 2.0 TDI Automatic Gearbox Multitronic CVT KTS 01J300062G WARRANTY

€1,804.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0CW300028R

Audi Q2 GA 1.5 TFSI DXDB Automatic Gearbox S-Tronic WAJ 0CW300028R WARRANTY

€949.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B5300056C-1

Audi S4 B8 S5 8T 3.0 TFSI CGWC Quattro Automatic Gearbox NSC 0B5300056C WARRANTY

€1,557.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0AW300046B

Audi A5 8T 8F 2.0 TFSI Automatic Gearbox Multitronic LKV 0AW300046B WARRANTY

€2,374.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0AM300050E

Audi A3 8P 1.8 TFSI CDAA Automatic 7 Speed Gearbox MPJ 0AM300050E WARRANTY

€1,424.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 09E300039GX

Audi S8 D3 5.2 FSI V10 BSM Quattro Automatic Gearbox KLW 09E300039GX WARRANTY

€854.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0CJ300043L

Audi Q5 FY 2.0 TDI DTPA Automatic Gearbox S-Tronic UNE 0CJ300043L WARRANTY

€2,089.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0GC300014L-1

Audi Q2 GA 2.0 TDI DTTC Quattro Automatic Gearbox UEN DQ381 0GC300014L WARRANTY

€2,042.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0DL300013F-1

Audi RSQ3 F3 2.5 TFSI DNWA Quattro Automatic Gearbox TVD 0DL300013F WARRANTY

€2,137.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0DK300041Q

Audi A6 C8 50 TFSIe Hybrid Quattro Automatic Gearbox VVR 0DK300041Q WARRANTY

€3,989.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0B6300036C

Audi S5 8T 4.2 V8 FSI Quattro Automatic Gearbox LMJ 0B6300036C WARRANTY

€1,424.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0CK300045H

Audi A4 B9 2.0 TFSI DLVA Automatic Gearbox S-Tronic TFE 0CK300045H WARRANTY

€1,377.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 0HL300041

Audi A6 C8 3.0 TFSI Quattro Dual Clutch Automatic Gearbox SCE 0HL300041 WARRANTY

€3,134.95

Free delivery: Jul 8 – 13

If paid before 14:00

Part no. 02E300043S

Audi A3 8P VW Golf Mk5 2.0 TDI BMN Automatic Gearbox DSG 02E300043S JPQ WARRANTY

Product currently unavailable

Part no. 0B5300055K

Audi Q5 8R 3.0 TDI CCWA Quattro Automatic Gearbox DSG MSH 0B5300055K WARRANTY

Product currently unavailable

Part no. 0B5300057H

Audi S4 B8 S5 8T 3.0 TFSI CAKA Quattro Automatic Gearbox LJD 0B5300057H WARRANTY

Product currently unavailable

Part no. 01J300061P

Audi A6 C6 2.0 TDI BRE Automatic Gearbox Multitronic KTD 01J300061P WARRANTY

Product currently unavailable

Part no. 0B5300056A

Audi A4 B8 A5 8T 3.0 TDI CCWA Quattro Automatic Gearbox MSC 0B5300056A WARRANTY

Product currently unavailable

Part no. 0B5300055L

Audi Q5 8R 2.0 TDI CGLB Quattro Automatic Gearbox DSG MSJ 0B5300055L WARRANTY

Product currently unavailable

Part no. 02E300016B

Audi TTS 8J 2.0 TFSI CDLB Quattro DSG Automatic Gearbox PQQ 02E300016B WARRANTY

Product currently unavailable

Part no. 0AW300046

Audi A5 8T 2.0 TFSI Automatic Gearbox LKT 0AW300046 WARRANTY

Product currently unavailable

Part no. 0CK300042J

Audi A6 C7 A7 4G 3.0 TDI CZVB Automatic Gearbox S-Tronic RLA 0CK300042J WARRANTY

Product currently unavailable

Part no. 02E300058F

Audi Q3 8U 1.4 TFSI Automatic Gearbox S-Tronic NUV 02E300058F WARRANTY

Product currently unavailable

Part no. 0GC300012A

Audi S3 8V 2.0 TFSI Quattro Automatic Gearbox S-Tronic SWQ 0GC300012A WARRANTY

Product currently unavailable

Part no. 0GC300012H

Audi S3 8Y 2.0 TFSI Quattro Automatic Gearbox S-Tronic TEY 0GC300012H WARRANTY

Product currently unavailable

Part no. 09G300035GX

Audi TT TTS 8N 1.8T AUQ 6 Speed Automatic Gearbox FXA 09G300035GX WARRANTY

Product currently unavailable

Part no. 0AW300047A-1

Audi A4 B8 A5 8T 3.0 TDI Automatic Gearbox Multitronic NDY 0AW300047A WARRANTY

Product currently unavailable

Part no. 0AM300054H

Audi A1 8X 1.4 TFSI CAVG Automatic 7 Speed Gearbox NTW 0AM300054H WARRANTY

Product currently unavailable

Part no. 0B5300061H

Audi S6 C7 4.0 TFSI CTGE Quattro S-Tronic Gearbox SKK 0B5300061H WARRANTY

Product currently unavailable

Part no. 0GC300012B

Audi A3 8V 2.0 TDI Quattro Automatic Gearbox S-Tronic SWR 0GC300012B WARRANTY

Product currently unavailable

Part no. 0BH300011Q

Audi RS3 8P 2.5TFSI Quattro Automatic Gearbox NFA S-Tronic 0BH300011Q WARRANTY

Product currently unavailable

Part no. 0B5300058P

Audi A4 B8 A5 8F 8T 2.0 TFSI Quattro Automatic Gearbox NGU 0B5300058P WARRANTY

Product currently unavailable

Part no. 0DL300013E

Audi RS3 8V 2.5 TFSI DNWA Quattro Automatic Gearbox TTU 0DL300013E WARRANTY

Product currently unavailable

Part no. 0B5300060P

Audi Q5 8R 2.0 TDI Quattro Automatic Gearbox S-Tronic PWX 0B5300060P WARRANTY

Product currently unavailable

Part no. 0B5300056L

Audi S6 C7 S7 4G 4.0 TFSI CEUC Quattro Automatic Gearbox NSK 0B5300056L WARRANTY

Product currently unavailable

Part no. 0AW300045T

Audi A4 B8 1.8 TFSI CDHB Automatic Gearbox Transmission LKS 0AW300045T WARRANTY

Product currently unavailable

Part no. 0D5300041F

Audi Q7 4M 3.0 TFSI DCBD Quattro Automatic Gearbox UEF 0D5300041F WARRANTY

Product currently unavailable

Part no. 02E300043M

Audi A3 8P VW Golf 5 2.0 TDI Automatic Gearbox DSG 02E300043M HFQ MWARRANTY

Product currently unavailable

Part no. 0CJ300042N

AUDI A5 F5 2.0 TFSI Quattro Automatic Gearbox S-Tronic TCF 0CJ300042N WARRANTY

Product currently unavailable

Part no. 09D300037N

Audi Q7 4L 4.2 TDI Quattro Automatic Gearbox JVH 6 Speed 09D300037N WARRANTY

Product currently unavailable

Part no. 02E300013NX

Audi S3 8P 2.0 TFSI CDLA Quattro DSG Automatic Gearbox MMF 02E300013NX WARRANTY

Product currently unavailable

Part no. 0DL300011D

Audi RS3 8V 2.5 CZGB Quattro Automatic Gearbox QFQ 0DL300011D WARRANTY

Product currently unavailable

Part no. 0B4300027A

Audi S4 B8 3.0 TFSI CAKA Quattro Manual Gearbox 6 Speed KMR 0B4300040E WARRANTY

Product currently unavailable

Part no. 0BH300012R

Audi Q3 8U 2.0 TFSI CULB Quattro Automatic Gearbox DSG RBW 0BH300012R WARRANTY

Product currently unavailable

Part no. 0BH300012A

Audi Q3 8U 2.0 TDI CFGC Quattro Automatic Gearbox NYD 0BH300012A WARRANTY

Product currently unavailable

Part no. 0CW300042F

Audi A3 8V Q2 GA 1.6 TDI Automatic Gearbox S-Tronic SSV 0CW300042F WARRANTY

Product currently unavailable

Part no. 0BK300040G

Audi RS6 C7 4.0 V8 Quattro Automatic Gearbox PTT 0BK300040G WARRANTY

Product currently unavailable

Part no. 0B5300061M

Audi A4 B8 A5 8T 2.0 TDI CDNC Quattro Automatic Gearbox LZL 0B5300061M WARRANTY

Product currently unavailable

Part no. 02E300054J

Audi A3 8P 2.0 TDI CFFB Automatic Gearbox Dual Clutch MSV 02E300054J WARRANTY

Product currently unavailable

Part no. 09L300040D

Audi A6 C6 3.0 TDI Automatic Gearbox Transmission JML 09L300040D WARRANTY

Product currently unavailable

Part no. 0B4300027A-1

Audi S4 B8 3.0 TFSI CAKA Quattro Manual Gearbox 6 Speed KMR 0B4300040E WARRANTY

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Showing 1-99 of 155 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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