Overview
The ZF 5840.303.679 SPUR GEAR is a precision-engineered component designed for the auxiliary drive train within ZF WG100, WG130, and WG131 transmissions. This OEM genuine part transfers rotational force between parallel shafts, ensuring smooth power delivery to the differential assembly. As a critical element of the gear train, the 5840.303.679 spur gear meshes directly with the 2098309011: CROWN WHEEL to manage torque distribution. The SKU 5840.303.679 is manufactured to ZF’s exacting tolerances, guaranteeing a precise fit and long service life in heavy-duty industrial applications.
Symptoms of Failure
- Whining or howling noise during deceleration: Worn gear teeth on the 5840.303.679 produce a distinct high-pitched sound when the transmission is under load, often mistaken for differential failure.
- Vibration in the driveline at specific RPMs: As the spur gear loses its tooth profile, it creates cyclical vibrations that can be felt through the chassis, particularly between 40-60 km/h.
- Metallic debris in the transmission oil filter: Flaking or pitting of the gear surface introduces ferrous particles into the lubrication system, a clear indicator of spur gear degradation.
- Intermittent gear slipping under heavy load: When the spur gear cannot maintain proper engagement with the 2098309009: DIFFERENTIAL HOUSING assembly, torque transfer becomes inconsistent, causing momentary power loss.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 5840.303.679 |
| Type | Spur Gear (Helical Cut) |
| Material | Case-Hardened Alloy Steel (20MnCr5) |
| Outside Diameter | 142.5 mm |
| Face Width | 38.0 mm |
| Bore Diameter | 45.0 mm |
| Number of Teeth | 37 |
| Module | 3.5 |
| Weight | 1.85 kg |
| OEM Reference | ZF 5840.303.679 |
Compatibility
This spur gear is specifically engineered for the ZF WG100, WG130, and WG131 transmission series. It is a direct replacement part for units manufactured after 2010. The 5840.303.679 also fits select variants of the WG180 and WG200 transmissions when used in conjunction with the 2099209001: DIFFERENTIAL assembly. For WG131 models, it pairs with the 2098109042: DIFFERENTIAL unit. Always verify your transmission serial number before ordering, as the 2098309010: DIFFERENTIAL HOUSING configuration may vary between early and late production runs.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2098109042 | DIFFERENTIAL | Distributes torque to axle shafts |
| 2098309011 | CROWN WHEEL | Receives drive from spur gear |
| 2099209001 | DIFFERENTIAL | Secondary torque distribution unit |
| 2098309010 | DIFFERENTIAL HOUSING | Encloses differential gears |
| 2098309009 | DIFFERENTIAL HOUSING | Alternate housing variant |
| 2098309031 | AXLE BEVEL GEAR | Transfers power to axle |
| 2098309030 | AXLE BEVEL GEAR | Matching bevel gear for opposite side |
| 2098309032 | DIFFERENTIAL BEVEL GEAR | Internal differential gear set |
| 12883200682 | THRUST WASHER | Reduces axial friction |
| 0635332059 | BALL BEARING | Supports rotating shafts |
ZF 5840.303.679 SPUR GEAR – Gear RFQ Support
ZF 5840.303.679 SPUR GEAR is handled as a gear-train sourcing item for transmission repair teams. PartsZF can review the part number and documentation before quotation.
Part-Number Summary
Use ZF number 5840.303.679 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: FRONT AXLE DRIVE
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 | 5840.303.679 |
|---|---|
| Normalized SKU | 5840303679 |
| 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
