ZF 4644.308.457 SPUR GEAR for WG200 | OEM Genuine Part

Overview

The ZF 4644.308.457 SPUR GEAR is a precision-machined component engineered specifically for the WG 200 series transmission. This gear is responsible for transferring rotational force between parallel shafts within the gear train, ensuring smooth power delivery and torque management under heavy-duty industrial loads. As an OEM genuine part, SKU 4644.308.457 meets ZF’s exacting tolerances for tooth profile and surface hardness, directly influencing shift quality and overall driveline efficiency. This spur gear sits within the intermediate shaft assembly, where it meshes with companion gears to maintain proper gear ratios during operation.

Symptoms of Failure

When the ZF 4644.308.457 spur gear begins to wear, operators may notice distinct operational issues. Whining or grinding noises during acceleration often indicate pitting or chipping on the gear teeth, a common failure mode in high-cycle applications. Intermittent gear slipping under load can occur when tooth profiles become worn, reducing the contact area and causing momentary loss of torque transfer. Metal debris in the transmission fluid is a clear sign of gear degradation, as fragments from the spur gear contaminate the oil system. Additionally, vibration through the shift lever or chassis may develop when the gear’s balance is compromised by uneven wear patterns.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 200 series transmission, which includes models such as WG200, WG210, and WG220. It is also compatible with the ZF WG 180 series in certain configurations, though verification of tooth count and shaft diameter is recommended before installation. The 4644.308.457 gear is used in both on-highway and off-highway applications, including municipal trucks, refuse vehicles, and construction equipment where the WG200 transmission is specified. For proper assembly, this gear must be paired with the correct 4644101212 TRANSMISSION HOUSING or the 4644301221 TRANSMISSION HOUSING to ensure correct alignment and bearing support.

During installation, technicians should also verify the condition of the 0730365067 TYPE PLATE to confirm the exact transmission variant, and replace the 0631311009 GROOVED STUD if any thread damage is observed. These components work together with the spur gear to maintain structural integrity and prevent oil leaks.

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