Mercedes Sprinter W906 Rear Differential Diff 51:13 3,923 A9063500900 WARRANTY

Listing details

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

Mercedes Sprinter W906 Rear Differential Diff 51:13 3,923 is a complete rear drive unit from the Differentials category, designed for installation in the vehicle's rear axle. It is a solution for users who expect stable torque transmission, proper traction, and predictable vehicle behavior under load. Thanks to its specific gear ratio, this axle is suitable for both transport applications and daily operation.

Specifications and technical data

• SKU: A9063500900
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A9063500900
• Substitutable numbers: A9063500900, A 906 350 09 00
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function of the rear axle in the Sprinter W906

The rear axle with differential in the Mercedes Sprinter W906 is responsible for the mechanical distribution of torque to the wheels of the driven axle and maintaining the correct gear ratio between the driveshaft and the wheel hubs. The properly selected 51:13 3,923 gear ratio allows for a balance between acceleration dynamics and fuel economy, which is significant for commercial vehicles operating under varying load conditions. The component is mounted in the rear part of the vehicle, in the drive axle, working in conjunction with the driveshaft and half-shafts.

Benefits of using a 51:13 3,923 gear ratio differential

An axle with this gear ratio is beneficial for users who expect predictable driving characteristics with typical working loads. In practice, this means:

• efficient starting from a standstill when fully loaded,
• maintaining stable engine RPM at cruising speeds,
• more uniform load on the drivetrain,
• better traction control in urban and suburban conditions.

For fleets and individual users, this translates into more predictable operating costs and comfortable vehicle performance in daily use.

Installation and operational characteristics

The axle with differential is designed for installation in the rear of the vehicle, replacing the factory axle drive unit. The design is prepared to work with the original drivetrain components of the Sprinter W906, which facilitates fitting it to the existing configuration. The correct selection of the gear ratio is crucial during replacement – it affects the gearbox operation, engine speed, and speedometer readings.

Before installation, it is recommended to verify the compatibility of the gear ratio with the current vehicle configuration and the planned usage style (city, highway, mixed work profile). A properly selected differential reduces excessive mechanical stress and lowers the risk of premature wear of other drivetrain components.

Gear ratio selection for driving style – technical support

If you want to better understand how the axle ratio affects your Sprinter's performance, it is worth consulting technical materials. In practice, a different gear ratio will be beneficial for a vehicle operating mainly in the city, and another for a vehicle covering long distances at a constant speed. A detailed discussion of the topic, along with examples and practical tips, can be found in the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style, which helps in consciously selecting a drive configuration for real operating conditions.

Expanding the drivetrain in your Mercedes – Differentials

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Mercedes and need other components from the same group, such as additional axles, differentials with different ratios, or complete rear axle assemblies, check out the available parts in the Mercedes Differentials category.

Summary

Mercedes Sprinter W906 Rear Differential Diff 51:13 3,923 is a solution for users who expect consistent drive characteristics tailored to the real working conditions of a commercial vehicle. The properly selected gear ratio, rear axle mounting, and compatibility with the Sprinter's drivetrain make it a practical choice when replacing a worn-out axle or adapting the vehicle to a specific operational profile. This allows you to maintain stable driving parameters, proper traction, and predictable vehicle behavior under load.