ZF 4642.308.404 SPUR GEAR for WG150 | OEM Genuine Part

Overview

The ZF 4642.308.404 SPUR GEAR is a critical power transmission component engineered specifically for the WG150 series transmission. This OEM genuine part transfers rotational force between parallel shafts within the gear train, ensuring precise torque delivery and smooth operation under heavy industrial loads. As a hardened spur gear, it maintains constant mesh alignment to reduce vibration and mechanical wear. The SKU 4642.308.404 is manufactured to ZF’s exacting tolerances, making it a direct replacement for failed gears in your WG150 assembly. This gear interfaces directly with the 4642101108: TRANSMISSION HOUSING and the 4642301208: TRANSMISSION HOUSING, both of which provide the structural support necessary for proper gear alignment.

Symptoms of Failure

• Whining or grinding noise during gear engagement — Worn spur gear teeth produce a distinct high-pitched whine or metallic grinding sound, especially under load or during shifting. This indicates pitting or chipping on the tooth flanks.
• Intermittent power loss or gear slipping — As the gear teeth wear unevenly, the transmission may momentarily lose torque transfer, causing the vehicle to hesitate or slip out of gear during acceleration.
• Metallic debris in transmission fluid — Flakes or particles of hardened steel found during oil changes signal advanced gear degradation. This debris can clog the 4642301168: SCREEN SHEET or 4642301169: SCREEN SHEET, leading to further contamination.
• Excessive backlash or vibration — Increased play between meshing gears causes driveline shudder, particularly at low speeds or when reversing. This often accompanies damage to the 0631311009: GROOVED STUD that secures the gear assembly.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG150 series transmission. It also fits select variants of the WG180 and WG200 models where the gear train architecture is shared. The part is not compatible with older WG120 or WG130 series units without modification. For proper installation, ensure the 0730365125: TYPE PLATE on your transmission housing confirms the model designation. Additional supporting components such as the 0636100621: HEXAGON SCREW and 0630361029: SEALING CAP are often replaced concurrently to prevent fluid leaks.

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