ZF 4644.351.097 SPUR GEAR for WG201 | OEM Genuine Part

Overview

The ZF 4644.351.097 SPUR GEAR is a critical power transmission component engineered specifically for the WG 201 Series transmission. This OEM genuine part transfers rotational force between parallel shafts within the gear train, ensuring smooth torque delivery and precise speed regulation. Positioned within the intermediate shaft assembly, the spur gear directly meshes with adjacent gears to maintain synchronization under heavy load conditions. The SKU 4644.351.097 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life in commercial vehicle drivelines. For optimal assembly integrity, this gear should be installed alongside a 4644101172 TRANSMISSION HOUSING and a 4644301390 TRANSMISSION HOUSING to maintain proper alignment and bearing support.

Symptoms of Failure

• Whining or grinding noise during gear engagement: Worn spur gear teeth produce a distinct metallic whine or grinding sound, particularly noticeable during acceleration or deceleration. This is a common long-tail search query for “ZF transmission whining noise when shifting.”
• Intermittent power loss under load: As the gear teeth wear unevenly, torque transmission becomes erratic, causing the vehicle to lose power momentarily when climbing grades or hauling heavy loads. Search terms like “WG201 transmission slipping under load” often point to this issue.
• Metallic debris in transmission fluid: Flaking or chipped gear teeth shed metal particles into the oil, visible during fluid changes as glitter-like contamination. This symptom is frequently searched as “metal shavings in ZF transmission oil.”
• Vibration through the driveline: A worn spur gear creates imbalance in the gear train, transmitting noticeable vibration through the chassis and shift lever, especially at specific RPM ranges.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 201 Series transmission, but it also fits select models within the WG180 and WG200 families due to shared gear train architecture. Specific compatible transmissions include the WG180, WG200, WG201, and WG210 series. The gear interfaces directly with the countershaft and main shaft assemblies. When replacing this part, always inspect the 4644301189 THREADED BUSH and 0636302005 SCREW PLUG for wear, as these components secure the gear train and prevent oil leakage. For complete sealing, use a 0634306198 O-RING and 0634801098 SEALING RING during reassembly.

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