ZF 4657.104.408 DIFFERENTIAL for WG 190/WG 210 | OEM Genuine Part

Overview

The ZF 4657.104.408 DIFFERENTIAL is a critical torque-distribution component engineered specifically for the WG 190 and WG 210 series transmissions. This OEM genuine part sits at the core of the final drive assembly, converting rotational input from the driveshaft into balanced power delivery to the axle shafts. As a precision-machined differential unit, the SKU 4657.104.408 ensures smooth cornering by allowing wheel speed variation while maintaining traction. It integrates directly with the TRANSMISSION HOUSING and is flanked by the HOUS.FRONT SECT and HOUSING REAR PART, forming a sealed, high-load assembly. This differential is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty industrial applications.

Symptoms of Failure

When the ZF 4657.104.408 differential begins to fail, operators often notice a distinct “whining or howling noise from the rear axle” during turns, indicating worn gear teeth or bearing surfaces. Another common symptom is “vibration under load at highway speeds,” which stems from uneven gear mesh within the differential case. You may also experience “oil leaking from the axle housing seals,” a sign that internal pressure or component misalignment has compromised the seals. Finally, “difficulty turning or a clunking sensation when shifting between forward and reverse” points to excessive backlash or damaged spider gears, necessitating immediate replacement of the 4657.104.408 unit.

Technical Specifications

Compatibility

This differential is primarily designed for the ZF WG 210 series, but it also fits the WG 190, WG 180, and WG 200 transmission models due to shared final drive architecture. It is a direct swap for units in off-highway trucks, wheel loaders, and industrial graders. For proper installation, ensure the CYLINDRICAL PIN is correctly aligned during assembly to prevent gear misalignment. Always verify the housing condition before mounting the differential.

Related Components

Frequently Asked Questions

Q: Can the 4657.104.408 differential be used in a WG 180 transmission?
A: Yes, this differential is compatible with WG 180, WG 190, WG 200, and WG 210 series transmissions, provided the housing and pinion gear match the original configuration.

Q: What tools are needed to replace this differential?
A: You will need a torque wrench, bearing puller set, and a dial indicator for backlash measurement. Always replace the CYLINDRICAL PIN during reassembly to ensure proper alignment.

Q: How do I confirm this is the correct OEM part?
A: Verify the SKU 4657.104.408 on the differential tag. It should match the OEM stamp on your original unit. Cross-reference with the TRANSMISSION HOUSING part number for complete verification.