ZF 4657.104.405 DIFFERENTIAL for WG 190/WG 210 | OEM Genuine Part

Overview

The ZF 4657.104.405 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, managing speed differentiation between the left and right output shafts while transmitting engine power to the wheels. The SKU 4657.104.405 is precision-machined to maintain optimal gear mesh patterns, ensuring smooth power delivery under heavy industrial loads. When paired with the 4657101039: TRANSMISSION HOUSING, this differential forms the sealed gearset chamber that protects internal components from contamination.

Symptoms of Failure

• Low-speed cornering chatter or grinding noise – Worn spider gears or side gears within the differential cause metallic rubbing sounds during tight turns, a classic sign the 4657.104.405 unit requires replacement.
• Uneven tire wear and driveline vibration – A failing differential that cannot properly distribute torque will cause one wheel to spin faster than the other, leading to accelerated tread wear and noticeable shuddering at highway speeds.
• Oil seepage from the axle housing interface – Degraded seals or cracked differential carrier surfaces allow transmission fluid to escape, leaving visible drips under the vehicle and lowering lubricant levels.
• Delayed engagement or wheel hop during acceleration – Internal gear backlash exceeding factory tolerances prevents immediate power transfer, causing a momentary lag followed by a jerking motion when starting from a stop.

Technical Specifications

Compatibility

This ZF 4657.104.405 differential is designed for the WG 190 and WG 210 transmission families, commonly found in medium-duty trucks, construction loaders, and agricultural tractors. It is also compatible with the WG 180 and WG 200 series when used with the appropriate 4657201028: HOUS.FRONT SECT and 4657201013: HOUSING REAR PART. For secure mounting, the 0631306792: CYLINDRICAL PIN must be installed to align the differential carrier within the housing bore.

Related Components

Frequently Asked Questions

Q: Can the 4657.104.405 differential be rebuilt, or must it be replaced entirely?
A: While individual bearings and seals can be serviced, the differential carrier and gear set are matched as a unit. ZF recommends replacing the complete 4657.104.405 assembly to maintain proper backlash and tooth contact patterns.

Q: What transmission fluid is recommended for the WG 190 differential?
A: Use a full-synthetic GL-5 gear oil with a viscosity of 75W-90. The differential cavity holds approximately 2.3 liters, and the fluid level should be checked at the fill plug on the 4657201013: HOUSING REAR PART.

Q: How do I verify the differential is correctly aligned during installation?
A: Insert the 0631306792: CYLINDRICAL PIN through the housing alignment holes before tightening any cap screws. This ensures the differential carrier sits concentrically within the 4657101039: TRANSMISSION HOUSING.