ZF 4642.252.051 SPUR GEAR for WG150 | OEM Genuine Part

Overview

The ZF 4642.252.051 SPUR GEAR is a precision-machined component engineered for the WG 150 series transmission. This gear is responsible for transferring rotational force between parallel shafts within the gear train, directly influencing torque delivery and overall driveline efficiency. As an OEM genuine part, SKU 4642.252.051 ensures exact fitment and material integrity, matching the original factory specifications for the WG150 planetary system. It operates within the main gear cluster, meshing with adjacent pinions to maintain synchronized speed ratios under heavy load conditions.

Symptoms of Failure

When the ZF 4642.252.051 spur gear begins to wear, operators may notice specific performance degradation. Common failure indicators include:

• Whining or grinding noise during gear engagement – Worn tooth profiles create irregular contact patterns, producing audible metallic sounds that intensify under load.
• Intermittent gear slipping under torque – As the spur gear loses its flank geometry, the transmission may momentarily lose power transfer, especially during uphill climbs or sudden acceleration.
• Metallic debris in the transmission oil pan – Flaking or pitting on the gear teeth releases ferrous particles into the lubricant, often detected during routine oil changes or filter inspections.
• Vibration through the driveline at specific RPM ranges – Uneven wear on the spur gear can induce harmonic vibrations that resonate through the housing and into the vehicle chassis.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 150 series transmission. Based on its dimensional characteristics and tooth profile, it is also compatible with the WG 180 and WG 200 series where the same gear cluster architecture is employed. Always verify the gear ratio and shaft spline configuration before installation. The part integrates directly with the 4642101109: TRANSMISSION HOUSING and the 4642301205: TRANSMISSION HOUSING, which provide the structural support for the gear set. Additionally, the 0730365125: TYPE PLATE should be consulted to confirm the exact transmission variant, while the 0631311009: GROOVED STUD secures the gear assembly within the housing.

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