ZF 4481.333.084 DIFFERENTIAL BEVEL GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4481.333.084 DIFFERENTIAL BEVEL GEAR is a precision-machined component designed to transfer torque from the driveshaft to the axle shafts within the differential assembly of ZF’s WG100, WG130, and WG131 transmissions. This OEM genuine part, identified by SKU 4481.333.084, sits at the heart of the final drive unit, meshing directly with the ring gear to enable smooth power distribution while allowing wheel speed differentiation during turns. Constructed from case-hardened alloy steel, it ensures minimal backlash and long service life under heavy loads. For optimal sealing and structural integrity, this gear is installed alongside the 4143101009: HOUSING and the 4143301025: HOUSING, which enclose the differential carrier.

Symptoms of Failure

When the 4481.333.084 bevel gear wears out, operators often notice these specific failure indicators:

• Whining or howling noise during turns: Worn gear teeth create a distinct high-pitched sound, especially when cornering under load.
• Vibration in the driveline: Excessive play between the bevel gear and ring gear causes noticeable shuddering at highway speeds.
• Metal particles in transmission fluid: Flaking or pitting on the gear surface contaminates the oil, visible during routine drain intervals.
• Intermittent loss of drive power: Severely damaged teeth can skip, leading to sudden torque interruption without complete failure.

Technical Specifications

Compatibility

This differential bevel gear is engineered exclusively for ZF transmission models in the WG series. Verified compatible units include:

• ZF WG100 (all variants)
• ZF WG130 (including WG130A and WG130B)
• ZF WG131 (standard and heavy-duty configurations)

It is not interchangeable with WG180 or WG200 series differentials due to differing tooth profiles and carrier dimensions. Always verify the existing gear ratio before installation. During rebuilds, replace the 0634313603: O-RING and 4475280018: SCREW PLUG to prevent fluid leaks from the housing.

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