Overview
The ZF 4108.203.113 BEVEL GEAR SET is a critical power-transfer component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part sits within the gear train assembly, where it converts rotational motion between non-parallel shafts, ensuring smooth torque delivery and precise gear synchronization. As a matched set, the bevel gears are designed to work in unison, reducing backlash and minimizing wear under heavy-duty industrial loads. The SKU 4108.203.113 is factory-calibrated to meet ZF’s exacting tolerances, making it essential for maintaining driveline integrity in commercial vehicles and off-highway equipment.
Symptoms of Failure
- Whining or howling noise during acceleration: Worn bevel gear teeth produce a distinct high-pitched sound, often mistaken for differential issues, indicating uneven tooth contact or pitting.
- Vibration through the drivetrain: As the gear set loses its precise mesh, vibrations transmit to the chassis, especially at specific RPM ranges, signaling advanced wear or chipped teeth.
- Metallic debris in transmission oil: Flakes or shavings found during routine oil changes point to surface fatigue or spalling on the bevel gear faces, requiring immediate replacement.
- Intermittent gear slipping or clunking: Backlash exceeding factory specifications causes delayed engagement or sudden torque release, compromising operational safety.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4108.203.113 |
| Gear Type | Spiral Bevel Gear Set (Matched Pair) |
| Material | Case-Hardened Alloy Steel (20MnCr5 Equivalent) |
| Weight | ~4.2 kg (9.3 lbs) |
| OEM Reference | ZF 4108.203.113 |
| Tooth Count (Drive/Driven) | 11 / 37 (Estimated) |
| Backlash Tolerance | 0.10 – 0.25 mm |
| Surface Hardness | 58–62 HRC |
Compatibility
This bevel gear set is specifically designed for ZF WG100, WG130, and WG131 transmissions. It is also compatible with select WG180 and WG200 variants that share the same gear train architecture, though cross-referencing with the transmission serial number is recommended. The set integrates directly with the 4108101031: HOUSING and the 4108303155: HOUSING, which provide the structural support for the gear mesh. Proper sealing is achieved using the 0636302015: SCREW PLUG and the 0630361037: SEALING CAP to prevent lubricant loss and contamination.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101031 | HOUSING | Encloses and supports the bevel gear set |
| 4108303155 | HOUSING | Secondary housing for gear alignment |
| 0636302015 | SCREW PLUG | Seals oil fill/drain ports |
| 0630361037 | SEALING CAP | Prevents debris ingress |
| 0730361010 | SEALING CAP | Alternate cap for vent ports |
| 0736305007 | SCREW PLUG | High-torque plug for pressure points |
| 0634801165 | SEALING RING | Ensures leak-proof joints |
| 0730365280 | TYPE PLATE | Identification label for assembly |
| 0631311009 | GROOVED STUD | Secures housing alignment |
| 4108108019 | INTERM.GEARBOX | Intermediate gearbox for power routing |
ZF 4108.203.113 BEVEL GEAR SET – Gear RFQ Support
ZF 4108.203.113 BEVEL GEAR SET 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 4108.203.113 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
This gear supports gear train repair, rebuild, and part-number matching work. Send machine, transmission, or removed-part evidence with your RFQ for faster review.
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 | 4108.203.113 |
|---|---|
| Normalized SKU | 4108203113 |
| Part name | BEVEL GEAR SET |
| 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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