Mini Cooper One F54 F55 F56 Petrol B36 B38 Automatic Gearbox GA6F21AW WARRANTY

Listing details

The gearboxes are sold with a 90-day warranty! They were tested before removal and are in full working order.

Mini Cooper One F54 F55 F56 Petrol B36 B38 Automatic Gearbox GA6F21AW WARRANTY is a factory-original automatic transmission designed for petrol units, engineered for precise cooperation with B36 and B38 series engines. This type of used automatic transmission ensures smooth gear shifting while maintaining the dynamics and driving comfort characteristic of MINI. It is a solution for users who expect consistent drivetrain performance and compliance with the manufacturer's factory standards.

Specifications and technical data

• SKU: 8741902
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 8741902
• Substitutable numbers: 24008741902, 8741902, 24008687030, 8687030, 24008488902 24008685402 24008650909, 24008685202 24008675202, 24618631609 24008608020, 8488902 8685402, 8650909 8685202, 8675202 8631609 8608020
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Other Transmission & Drivetrain

Purpose and compatibility with petrol units

The presented automatic transmission has been developed to work with MINI B36 and B38 series petrol engines in the F56 body. This means that the transmission design, control systems, and gear ratios are adapted to the parameters of these units, which translates into predictable vehicle behavior across the entire rev range. Dedicated tuning with the engine reduces the risk of improper drivetrain operation and facilitates future diagnostics.

Characteristics of the GA6F21AW automatic transmission

The GA6F21AW automatic transmission belongs to the category of modern torque converter transmissions that combine ease of use with high torque transfer efficiency. The use of automatic control allows for:

• smooth acceleration without jerking,
• efficient downshifting when overtaking,
• stable operation in city traffic and on the highway.

Thanks to this, the driver can focus on driving rather than manual gear changes, which is particularly beneficial in daily use. Automation of the gear shifting process also promotes even loading of drivetrain components.

Using a pre-owned part in a MINI

Choosing a used transmission for a MINI is a solution that allows you to maintain the factory drivetrain design while optimizing repair costs. This type of component is particularly attractive in situations where:

• the existing transmission has suffered mechanical or operational damage,
• a quick replacement of the complete transmission is necessary instead of costly regeneration,
• compliance with original MINI solutions is important.

Using an original, used transmission allows you to maintain proper mounting points, factory gear ratios, and compatibility with the vehicle's electronics, which facilitates installation and subsequent service maintenance.

Assembly and technical aspects

The GA6F21AW transmission is a design adapted to work with the factory control systems of the MINI F56, which facilitates a near plug-and-play installation (while adhering to service and adaptation procedures required by the manufacturer). In practice, this means:

• retaining original mounting points to the body and engine,
• the ability to integrate with the existing transmission oil cooling system,
• consistency with factory gear shift maps stored in the vehicle's ECUs.

This approach minimizes the need for mechanical and electrical modifications while maintaining driving characteristics consistent with the manufacturer's specifications. Structural consistency with the F56 platform is crucial for the durability and proper operation of the entire drivetrain.

Why choose an original MINI transmission

The original automatic transmission for the MINI F56 with B36/B38 engines is a solution that provides:

• preservation of factory handling and acceleration characteristics,
• better predictability of vehicle behavior compared to aftermarket replacements of uncertain origin,
• easier integration with existing electronics and safety systems.

For users who value the consistency of technical solutions and the comfort of automatic gear shifting, this is a sensible choice when repairing or replacing a transmission. Maintaining the original drivetrain architecture also promotes stable vehicle value in the long term.

If you are planning a comprehensive repair or upgrade of your MINI's drivetrain area and need other components from the same group, such as automatic transmissions, transmission control elements, or drivetrain-related parts, check out the available parts in the Other Mini category.

To compare the characteristics of various sports drivetrains and better understand how manufacturers design engines, transmissions, and chassis, it is worth reading the analysis of high-performance models – you will find practical information in the article Audi RS vs other models – what is hidden under the hood and chassis?.