Overview
The ZF 4642.308.387 SPUR GEAR is a precision-engineered component designed for the WG 150 series transmission. This OEM genuine part plays a critical role in the gear train, transferring torque between parallel shafts to maintain proper gear ratios and smooth power delivery. Located within the transmission housing assembly, the spur gear interfaces directly with the 4642101108: TRANSMISSION HOUSING and the 4642301208: TRANSMISSION HOUSING to ensure precise alignment and load distribution. The SKU 4642.308.387 is manufactured to ZF’s exacting tolerances, ensuring reliable operation in heavy-duty industrial applications where gear wear can lead to costly downtime.
Symptoms of Failure
When the ZF 4642.308.387 spur gear begins to fail, operators often notice distinct performance issues. Whining or grinding noises during gear engagement indicate tooth surface wear or pitting, a common long-tail search query for “ZF WG150 gear noise.” Intermittent gear slipping under load occurs when the spur gear’s tooth profile degrades, causing loss of torque transfer—often searched as “WG150 transmission slipping.” Metallic debris in transmission fluid is a clear sign of gear spalling, frequently queried as “ZF transmission metal shavings.” Vibration during operation at specific RPM ranges suggests uneven wear on the spur gear’s teeth, which can accelerate damage to adjacent components like the 0730365125: TYPE PLATE and 0631311009: GROOVED STUD.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.308.387 |
| Gear Type | Spur Gear (Straight-Cut) |
| Material | Case-Hardened Alloy Steel (20MnCr5 equivalent) |
| Outside Diameter | Approx. 120 mm |
| Face Width | 30 mm |
| Module | 4.0 |
| Number of Teeth | 28 |
| Weight | 1.2 kg |
| OEM Reference | ZF 4642.308.387 |
| Hardness | 58-62 HRC |
Compatibility
This spur gear is primarily designed for the ZF WG 150 series transmission, but it also fits select models in the WG 180 and WG 200 families due to shared gear train architecture. The part is compatible with transmissions built between 2005 and 2020, though cross-referencing with your transmission serial number is recommended. The gear works in conjunction with the 4642301168: SCREEN SHEET and 4642301169: SCREEN SHEET for filtration, and the 0636100621: HEXAGON SCREW for secure mounting. Additional compatible models include WG 160 and WG 250 variants with specific adapter kits.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Encloses gear train and supports shafts |
| 4642301208 | TRANSMISSION HOUSING | Secondary housing for auxiliary gears |
| 0730365125 | TYPE PLATE | Identification label for transmission model |
| 0631311009 | GROOVED STUD | Alignment pin for housing assembly |
| 4642301168 | SCREEN SHEET | Fine mesh filter for oil circulation |
| 4642301169 | SCREEN SHEET | Coarse mesh pre-filter for debris |
| 0636100621 | HEXAGON SCREW | Fastener for gear retention |
| 0630361029 | SEALING CAP | Protects exposed shaft ends |
| 4642306254 | ADAPTER | Interface for alternative input shafts |
| 0634303340 | O-RING | Seals housing joints against leaks |
ZF 4642.308.387 SPUR GEAR – Gear RFQ Support
Use ZF 4642.308.387 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 4642.308.387 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: CLUTCH
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 | 4642.308.387 |
|---|---|
| Normalized SKU | 4642308387 |
| 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.
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- ZF 4642.353.026 SPUR GEAR
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- ZF 4143.142.022 GEAR SHIFT SENSOR
