ZF 4642.252.037 SPUR GEAR for WG150 | OEM Genuine Part

Overview

The ZF 4642.252.037 SPUR GEAR is a critical power transmission component engineered specifically for the WG150 series. This OEM genuine part sits within the planetary gearset assembly, where it meshes directly with the sun gear and ring gear to facilitate torque multiplication and speed reduction during gear shifts. The SKU 4642.252.037 is precision-machined to ZF’s exacting tolerances, ensuring minimal backlash and optimal load distribution across the transmission’s internal driveline. When installed alongside the 4642101047 TRANSMISSION HOUSING and the 4642301207 TRANSMISSION HOUSING, this spur gear forms the backbone of the WG150’s torque path, directly influencing shift quality and overall drivetrain efficiency.

Symptoms of Failure

When the ZF 4642.252.037 SPUR GEAR begins to wear, operators will notice distinct performance degradation. Common failure indicators include:

• Whining or grinding noise during acceleration – Worn gear teeth produce a high-pitched metallic sound, especially under load, indicating surface pitting or tooth deformation.
• Intermittent gear slipping or delayed engagement – As tooth profiles degrade, the gear loses its ability to maintain positive mesh, causing hesitation or momentary loss of drive in forward or reverse.
• Metallic debris in transmission fluid – Flaking or chipped gear teeth shed ferrous particles into the oil, often visible during routine fluid changes or when inspecting the 4642301168 SCREEN SHEET.
• Vibration through the shift lever or chassis – Uneven tooth wear creates rotational imbalance, transmitting harsh vibrations that worsen at higher RPMs.

Technical Specifications

Compatibility

This ZF 4642.252.037 SPUR GEAR is primarily designed for the WG150 series transmission. Based on its gear geometry and spline configuration, it is also compatible with the following ZF models that share the same planetary carrier architecture: WG180, WG200, and WG250 (when used in lower-ratio positions). Always verify fitment by cross-referencing the 0730365067 TYPE PLATE affixed to your transmission housing. The gear is secured in place using the 0631311009 GROOVED STUD, which must be torqued to factory specifications during reassembly.

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