Overview
This ZF 5838.300.071 SPUR GEAR is a critical power transmission component engineered for the WG100, WG130, and WG131 series transmissions. It sits within the final drive assembly, directly meshing with the differential to transfer rotational force from the countershaft to the axle shafts. As an OEM genuine part, it ensures precise tooth geometry and metallurgical integrity, maintaining the exact factory tolerances required for quiet, efficient operation. The SKU 5838.300.071 is often replaced during a full gear train overhaul when paired with a new 5838109010: DIFFERENTIAL to restore backlash specifications.
Symptoms of Failure
- Whining or howling noise during acceleration: Worn spur gear teeth create a high-pitched whine that increases with road speed, often misdiagnosed as wheel bearing noise.
- Metal shavings in transmission fluid: Pitting or spalling on the gear face releases fine metallic particles into the oil, visible during drain intervals.
- Intermittent gear slipping under load: Excessive tooth wear reduces engagement depth, causing momentary power loss when climbing grades or towing heavy loads.
- Vibration through the driveline: Uneven wear patterns on the spur gear induce cyclical vibrations felt in the chassis at specific RPM ranges.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.300.071 |
| Gear Type | Spur Gear, Straight Cut |
| Material | Case-Hardened Alloy Steel (20MnCr5) |
| Outside Diameter | ~180 mm |
| Face Width | ~35 mm |
| Number of Teeth | 41 |
| Weight | ~2.8 kg |
| OEM Reference | ZF 5838.300.071 |
| Hardness | 58-62 HRC |
Compatibility
This spur gear is specifically designed for ZF WG100, WG130, and WG131 transmissions. It also fits select variants of the WG180 and WG200 series when used with the correct 5838300626: DIFFERENTIAL HOUSING. Always verify the tooth count and spline interface before installation. For WG200 applications, it is commonly paired with a 0750117075: TAPER ROLLER BEARING to support axial loads. In WG131 builds, the gear often works alongside a 2093209023: DIFFERENTIAL for heavy-duty applications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109010 | DIFFERENTIAL | Distributes torque between axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial shaft loads |
| 2093209023 | DIFFERENTIAL | Heavy-duty torque distribution unit |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential and gear assembly |
| 0631329088 | SPRING PIN | Secures gear alignment on shaft |
| 5838300811 | THRUST WASHER | Controls axial clearance in gear stack |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel axles |
| 5838300633 | AXLE | Driveshaft component for final drive |
| 5838300753 | THRUST WASHER | Reduces friction on gear side faces |
| 5838300818 | THRUST WASHER | Secondary axial load distribution |
Frequently Asked Questions
Q: Can the 5838.300.071 spur gear be used in a ZF WG180 transmission?
A: Yes, it is compatible with WG180 when used with the correct differential housing (5838300626). Always confirm tooth count and spline dimensions before ordering.
Q: What are the torque specifications for the retaining nut on this gear?
A: The retaining nut should be torqued to 450 Nm (332 ft-lbs) and staked in place. Use a new spring pin (0631329088) to prevent loosening during operation.
Q: How do I identify a worn spur gear without removing the transmission?
A: Listen for a rhythmic whining noise that changes with vehicle speed. If metal particles appear on the magnetic drain plug, the gear face is likely spalling and requires immediate replacement.
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ZF 5838.300.071 SPUR GEAR – Gear RFQ Support
Use ZF 5838.300.071 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 5838.300.071 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: P.T.O. SHAFT
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 | 5838.300.071 |
|---|---|
| Normalized SKU | 5838300071 |
| 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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