ZF 4646.252.047 SPUR GEAR for WG250 | OEM Genuine Part

Overview

The ZF 4646.252.047 SPUR GEAR is a critical power transmission component engineered specifically for the WG 250 Series transmission assembly. This OEM genuine part, identified by SKU 4646.252.047, functions as the primary drive gear within the planetary gearset, transferring rotational torque from the input shaft to the intermediate shaft. Positioned directly within the main gear housing, this spur gear ensures smooth, synchronized engagement during load shifts. It works in concert with the TRANSMISSION HOUSING and the HOUSING to maintain precise gear alignment and reduce vibration under heavy-duty industrial operation.

Symptoms of Failure

When the 4646.252.047 spur gear begins to wear, operators often notice distinct performance degradation. Common failure symptoms include:

• Audible gear whine or grinding noise during acceleration or deceleration, indicating tooth surface pitting or chipping.
• Intermittent gear slipping under load, especially when shifting between forward and reverse in WG250 transmissions.
• Metallic debris in transmission fluid during routine oil changes, a clear sign of spur gear material fatigue.
• Increased backlash or play in the drivetrain, causing delayed engagement and rough shifting patterns.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 250 Series transmission, but it also fits select models in the WG180, WG200, and WG240 families where the planetary gearset shares identical tooth geometry. It is not compatible with WG300 or higher series without modification. The gear interfaces directly with the COVER assembly and is secured using HEXAGON SCREW fasteners to prevent axial displacement during high-torque operation.

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