Ford Transit Mk8 Rear Axle Differential Diff 3.15 Ratio BK31-4001-AAH WARRANTY

Listing details

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

Ford Transit Mk8 Rear Axle Differential Diff 3.15 Ratio is an original drivetrain component designed for installation on the vehicle's rear axle. This used differential ensures stable torque transfer to the wheels, supporting smooth and predictable operation of the drive axle. By maintaining the factory 3.15 gear ratio specification, it is the right choice for repairs and rebuilding of the rear-wheel drive system in the Ford Transit Mk8.

Specifications and technical data

• SKU: 2392788
• Mark: Ford
• Condition: Used
• OEM Part Number: 2392788
• Substitutable numbers: 2392788, BK31-4001-AAH, BK314001AAH, FH21053
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function of the differential

The presented differential belongs to the Differentials category and is designed to operate in the rear part of the drivetrain. It is responsible for distributing torque between the rear wheels, allowing for differences in rotational speed when cornering and under varying loads. The properly selected 3.15 gear ratio allows for maintaining factory characteristics of acceleration, engine RPM, and fuel consumption.

Its placement on the vehicle in the rear axle zone means the differential works directly with the drive axle, half-shafts, and wheel hubs. Replacing it with a component of the matching gear ratio is crucial for maintaining the correct operation of the ABS system, electronic stability control, and driving comfort.

Benefits of using an original Ford differential

The differential from the Ford brand ensures compliance with factory manufacturing and fitment standards. The original design guarantees:

• proper fitment with the axle housing and mounting components,
• compliance with the factory 3.15 gear ratio,
• stable cooperation with the stock Ford Transit Mk8 drivetrain.

Thanks to this, the installation process is predictable, without the need for structural modifications to the axle or additional alterations. This solution is particularly beneficial for professional fleet repairs, where repeatability and compliance with service documentation are essential.

Application in service practice

The used rear differential with a 3.15 gear ratio is suitable for situations where it is necessary to replace a damaged or excessively worn component in a Ford Transit Mk8. This is especially important in vehicles operated under heavy loads, where the drivetrain works in demanding conditions. Using an original differential allows for maintaining predictable vehicle behavior under load, both in city traffic and on the highway.

This component is suitable for workshops specializing in servicing Ford commercial vehicles, as well as for individual users who expect a technically correct, durable repair without experimenting with unreliable replacements.

Gear ratio selection and technical support

When replacing a differential, it is crucial to match the gear ratio to the existing drivetrain configuration and driving style. To better understand the relationship between axle ratio, acceleration characteristics, and driving economy, it is worth consulting a specialist guide. A detailed discussion of the topic can be found in the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style, which describes definitions, gear ratio selection, and practical application examples.

Expanding the Ford Transit drivetrain

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Ford and need other components from the same group, such as drive axles, complete differentials, or axle housings, check out the available parts in the Ford Differentials category.

Summary

Ford Transit Mk8 Rear Axle Differential Diff 3.15 Ratio is a technically matched, used drivetrain component designed for installation on the rear axle. Its original Ford origin, correct gear ratio, and design dedicated to the Transit Mk8 make it a sensible choice for professional differential replacement in a commercial vehicle. By maintaining factory drivetrain parameters, it allows for stable handling, predictable performance, and consistency with other rear axle components.