Overview
The ZF 4642.351.023 SPUR GEAR is a critical power transmission component engineered for the WG150 series. This OEM genuine part precisely meshes within the planetary gear set to transfer torque from the input shaft to the output shaft, ensuring smooth gear engagement and reliable load distribution. As a hardened steel spur gear, it directly influences the overall efficiency and noise levels of the transmission assembly. The SKU 4642.351.023 is a direct replacement for worn gears, restoring original ZF performance and preventing drivetrain degradation.
Symptoms of Failure
- Whining or grinding noise during gear shifts: Worn gear teeth create excessive backlash, producing a high-pitched whine or metallic grinding sound, especially under load or during acceleration.
- Intermittent gear slipping or loss of power: As the spur gear teeth wear down, the transmission may fail to maintain positive engagement, causing sudden power loss or slipping in forward or reverse gears.
- Metallic debris in transmission fluid: Flaking or pitting on the gear surface sheds metal particles into the oil, which can be detected during routine fluid changes or via magnetic drain plugs.
- Vibration at specific RPM ranges: Uneven tooth wear introduces rotational imbalance, leading to noticeable vibration through the chassis or shift lever at certain engine speeds.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4642.351.023 |
| Gear Type | Spur Gear (Straight-Cut) |
| Material | Case-Hardened Alloy Steel (20MnCr5 equivalent) |
| Outside Diameter | ~120 mm |
| Face Width | ~35 mm |
| Module | 3.5 (estimated) |
| Number of Teeth | 32 (estimated) |
| Weight | ~1.2 kg |
| OEM Reference | ZF 4642.351.023 |
Compatibility
This spur gear is specifically designed for the ZF WG150 series transmission. It is also compatible with the WG180 and WG200 models that share the same planetary gear architecture. Always verify the gear tooth count and shaft spline configuration against your existing assembly. For proper installation, ensure the TRANSMISSION HOUSING (4642101109) and TRANSMISSION HOUSING (4642301205) are free of cracks or warping. Secure the gear using the GROOVED STUD (0631311009) and verify the TYPE PLATE (0730365125) matches your transmission model for correct gear ratios.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses and supports gear train |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing variant for WG150 |
| 0730365125 | TYPE PLATE | Identifies transmission model and ratio |
| 0631311009 | GROOVED STUD | Secures gear to shaft |
| 4642301168 | SCREEN SHEET | Filters debris from oil flow |
| 4642301169 | SCREEN SHEET | Fine-mesh oil filter |
| 0636100621 | HEXAGON SCREW | Fastens housing components |
| 4642301186 | SCREEN SHEET | Secondary oil strainer |
| 4644106300 | SHIFT SYSTEM | Controls gear engagement |
| 4644306500 | COVER PLATE | Seals transmission access port |
ZF 4642.351.023 SPUR GEAR – Gear RFQ Support
Use ZF 4642.351.023 SPUR GEAR as the reference when requesting gear support. Photos, visible markings, and transmission context help reduce sourcing uncertainty.
Part-Number Summary
Use ZF number 4642.351.023 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: COUPLING
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4642.351.023 |
|---|---|
| Normalized SKU | 4642351023 |
| Part name | SPUR GEAR |
| Product category | gear |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
Related Parts
- ZF 4661.302.010 GEAR
- ZF 2094.306.024 GEAR SHIFT RAIL
- ZF 4642.353.026 SPUR GEAR
- ZF 4143.142.013 GEAR SHIFT SENSOR
- ZF 4143.142.022 GEAR SHIFT SENSOR
