ZF 4644.353.022 SPUR GEAR for WG180 | OEM Genuine Part

Overview

The ZF 4644.353.022 SPUR GEAR is a critical power transmission component engineered specifically for the WG 180 series of heavy-duty transmissions. This OEM genuine part, identified by SKU 4644.353.022, functions as the primary gear that transfers rotational force from the input shaft to the intermediate shaft, ensuring precise torque distribution and smooth gear engagement. Located within the main gear cluster assembly, this spur gear works in direct conjunction with the 4644101043: TRANSMISSION HOUSING and the 4644301194: TRANSMISSION HOUSING to maintain proper alignment and load-bearing capacity during operation.

Symptoms of Failure

When the 4644.353.022 spur gear begins to wear out, operators typically notice three distinct failure indicators. First, a pronounced gear whining or grinding noise during acceleration or deceleration signals tooth surface degradation. Second, intermittent gear slipping under load occurs when the gear teeth lose their hardened profile, causing the transmission to momentarily lose power transfer. Third, metallic debris in the transmission fluid appears as fine silver particles, indicating advanced wear of the gear flanks. Fourth, difficulty engaging specific forward gears may develop as the spur gear’s tooth geometry becomes irregular, leading to incomplete meshing with mating components.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 180 series transmissions, including models WG180, WG180A, and WG180B. It also fits select variants of the ZF WG 200 series when used in conjunction with the correct 0730365067: TYPE PLATE for model identification. The gear is compatible with both standard and reinforced housing configurations, provided the 0631311009: GROOVED STUD is used for proper axial retention. Always verify the transmission serial number against the type plate before installation.

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