ZF 4131.302.111 AXLE BEVEL GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4131.302.111 Axle Bevel Gear is a precision-machined component engineered for the differential carrier assembly within ZF WG100, WG130, and WG131 transmissions. This OEM genuine part transfers rotational power from the driveshaft to the axle shafts at a right angle, enabling smooth torque distribution to the wheels. The SKU 4131.302.111 is a critical wear item that maintains gear mesh alignment and reduces drivetrain noise. It sits directly inside the main housing, where it interfaces with the ring gear and pinion shaft to manage load stresses during heavy-duty industrial operations.

Symptoms of Failure

• Whining or howling noise during acceleration: Worn bevel gear teeth create irregular contact patterns, producing a distinct high-pitched sound that intensifies under load.
• Vibration in the driveline at steady speeds: Excessive backlash from a degraded 4131.302.111 gear causes rhythmic shaking felt through the chassis or steering wheel.
• Metallic debris in transmission oil: Flaking or pitting on the gear surface sheds metal particles into the lubricant, visible during oil changes or when inspecting the HOUSING drain plug.
• Intermittent loss of drive power: Severe tooth wear can cause the gear to skip under torque, leading to momentary disengagement and reduced traction.

Technical Specifications

Compatibility

This axle bevel gear is specifically designed for ZF WG100, WG130, and WG131 transmission models. It is also compatible with select variants of the WG180 and WG200 series when used in single-reduction axle configurations. Always verify the gear ratio and housing fitment before installation. The gear mates directly with the HOUSING and requires a new GASKET and CAP SCREW set during reassembly to prevent oil leaks and maintain torque retention.

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