BMW X5 E70 LCI X6 E71 Transfer Case Box Transmission ATC450 7635753 WARRANTY

Listing details

The differential is sold with a 90-day warranty! It was tested before removal and is in full working order.

BMW X5 E70 LCI X6 E71 Transfer Case Box Transmission ATC450 is a drivetrain component designed to work with the automatic transmission in BMW vehicles. This transfer case from the Transfer Cases group is responsible for the precise distribution of torque between the axles, which directly impacts the traction, stability, and predictable handling of the vehicle in various road conditions.

Specifications and technical data

• SKU: 7643751
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7619178
• Substitutable numbers: 27107643751, 7643751, 27107609196, 27107639271, 27107605344, 27107629605, 27107610586, 27107627944, 27107619178, 27107635753, 27107629405, 27107636480, 7609196, 7639271, 7605344, 7629605, 7610586, 7627944, 7619178, 7635753, 7629405, 7636480, 27607643762, 7643762
• Gearbox type: Automatic
• Category: Transfer Cases

Purpose and role of the ATC450 transfer case

The ATC450 transfer case used in the BMW X5 E70 LCI and BMW X6 E71 is a key component of the xDrive system, responsible for dynamic all-wheel drive management. Its task is to transfer torque from the automatic transmission to the drive shafts in a controlled manner, which reduces wheel slip and improves vehicle stability during acceleration, engine braking, and cornering.

Thanks to its specific design, the transfer case works with the vehicle's electronics, allowing for smooth adjustment of torque distribution to current conditions – from dry asphalt to slippery, uneven surfaces. A properly selected and functional unit of this type has a direct impact on driving safety, the effectiveness of stability control systems, and the driving comfort of a heavy SUV.

Compatibility with automatic transmission

The presented transfer case has been designed to work with an automatic transmission, which means it is matched both mechanically and functionally to the gear-shifting characteristics of an automatic. The appropriate configuration of gears and clutches in the transfer case allows for:

• smooth torque transfer without jerking during gear changes,
• stable drivetrain behavior during rapid acceleration and downshifts,
• effective cooperation with traction control and vehicle stability systems.

For the user, this means predictable vehicle reactions, a reduction in unwanted vibrations, and better utilization of the drivetrain's capabilities in daily use and when driving in more difficult conditions.

Product characteristics and advantages of use

The transfer case from this series belongs to the group of OEM components used factory-standard in BMW vehicles, which translates into a proper fit for the transmission housing, drive shafts, and control system. Using the original design allows for maintaining factory drivetrain performance parameters without the need for modifying mounts or controller software.

The main benefits of installing this type of transfer case in a BMW X5 E70 LCI or X6 E71 include:

• maintaining compatibility with the factory xDrive system,
• restoring proper all-wheel drive operation after the failure of the previous component,
• reducing the risk of incorrect torque distribution, which can lead to accelerated wear of tires or drivetrain components.

The product comes from the used BMW Transfer Cases segment, which allows for economical vehicle repair while maintaining the original design specifications.

Selection, installation, and technical aspects

When selecting the ATC450 transfer case for a specific BMW X5 E70 LCI or X6 E71 configuration, it is crucial to verify compatibility with the automatic transmission used in the vehicle and the drivetrain version. In practice, this means checking the OEM part number and available interchangeable numbers in the product's technical specification, and then comparing them with the vehicle documentation or information from the manufacturer's catalog.

The installation process itself requires following service procedures typical for the BMW drivetrain, in particular:

• correct alignment of the transfer case relative to the automatic transmission and drive shafts,
• application of appropriate tightening torques for bolted connections,
• checking for leaks and properly filling the system with the appropriate operating fluid, in accordance with the vehicle manufacturer's recommendations.

Professional installation allows for fully utilizing the potential of this component and reducing the risk of secondary failures in the drivetrain.

Used transmission and transfer case – what to look out for

In the case of components such as the ATC450 transfer case, which work directly with an automatic transmission, many users consider the alternative between remanufacturing and purchasing a used unit. It is worth familiarizing yourself with issues related to the cost-effectiveness of such solutions, the differences between manual and automatic transmissions, and the importance of part number compatibility. This topic is discussed in more detail in the article: Used transmission – when it pays off and what you need to remember, which helps in making an informed decision about choosing the right drivetrain repair strategy.

If you are planning a comprehensive repair or upgrade of the drivetrain area in your BMW and need other components from the same group, such as transfer cases, transfer gearboxes, or elements working with the xDrive system, check the available parts in the BMW Transfer Cases category.