ZF 4642.351.070 SPUR GEAR for WG150 | OEM Genuine Part

Overview

The ZF 4642.351.070 SPUR GEAR is a critical power transmission component engineered specifically for the WG 150 series transmission. This OEM genuine part sits within the planetary gear set assembly, where it precisely transfers torque between the input shaft and the intermediate shaft. The spur gear’s straight-cut teeth ensure efficient, low-noise operation under heavy load conditions. As an integral element of the gear train, the SKU 4642.351.070 directly influences shift quality and overall driveline durability. For proper installation, this gear interfaces with the 4642101109: TRANSMISSION HOUSING and the 4642301205: TRANSMISSION HOUSING, which provide the structural support and alignment necessary for long service life.

Symptoms of Failure

When the ZF 4642.351.070 spur gear begins to wear, operators may notice several distinct failure indicators. Whining or grinding noise during gear engagement is a common early sign, often caused by pitting or chipping on the tooth flanks. Intermittent gear slipping under load occurs as the gear loses its ability to maintain positive engagement, leading to power loss during acceleration. Metallic debris in the transmission oil filter is a telltale symptom of advanced wear, as fragments from the spur gear contaminate the lubrication system. Additionally, vibration in the driveline at specific RPM ranges may indicate uneven tooth wear or misalignment, often requiring immediate inspection of the 0730365125: TYPE PLATE for correct part identification before replacement.

Technical Specifications

Compatibility

This ZF 4642.351.070 spur gear is primarily designed for the WG 150 series transmission. Based on its gear geometry and spline configuration, it is also compatible with the WG 180 and WG 200 series models that share the same planetary gear set architecture. The part may be found in certain WG 120 variants with matching torque ratings. Always verify the 0631311009: GROOVED STUD alignment during installation, as this fastener secures the gear hub to the shaft assembly. For transmissions with modified gear ratios, consult the original equipment documentation to confirm fitment.

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“text”: “Common failure causes include inadequate lubrication, contamination from metal particles, excessive torque loads, and misalignment of the transmission housing. Regular oil changes and inspection of the screen sheets can extend gear life.”
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“text”: “In most WG 150 series applications, the spur gear is accessible only after removing the transmission housing and disassembling the planetary gear set. This typically requires transmission removal from the vehicle for proper access and alignment.”
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