Overview
The ZF 4660.305.003 HELICAL GEAR is a precision-engineered component designed for the WG 92 Series transmission. This OEM genuine part plays a critical role in power transmission by meshing with adjacent gears to reduce noise and vibration while ensuring smooth torque transfer. Located within the gear train assembly, the helical gear (SKU: 4660.305.003) is responsible for maintaining consistent rotational speed and load distribution across the drivetrain. It interfaces directly with the 4660101012: TRANSMISSION HOUSING and the 4660301020: HOUSING, forming a sealed unit that protects internal components from contamination.
Symptoms of Failure
When the ZF 4660.305.003 helical gear begins to wear, operators may notice distinct performance issues. Common failure symptoms include:
- Whining or grinding noise during gear engagement — This often indicates tooth surface pitting or misalignment, a classic sign of helical gear fatigue.
- Intermittent gear slipping under load — Worn helical teeth can cause momentary loss of torque transmission, especially during acceleration or hill climbing.
- Metallic debris in transmission fluid — Flaking or chipped gear teeth produce fine metal particles, which can be detected during oil changes or filter inspections.
- Increased operating temperature — Excessive friction from a damaged gear leads to heat buildup, potentially triggering thermal warnings.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4660.305.003 |
| Gear Type | Helical, single-cut |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Module | 4.5 mm |
| Number of Teeth | 37 |
| Helix Angle | 15° (right-hand) |
| Outside Diameter | 175.5 mm |
| Face Width | 42 mm |
| Weight | 2.85 kg |
| OEM Reference | ZF 4660.305.003 |
| Surface Treatment | Phosphate coating for corrosion resistance |
Compatibility
This helical gear is specifically engineered for the ZF WG 92 Series transmission family. Based on its design and tooth geometry, the 4660.305.003 is compatible with the following ZF models: WG92, WG120, WG150, WG180, and WG200. It is also used in certain variants of the WG 92 Series with integrated retarder systems. For proper installation, ensure the gear is paired with the 0631306174: CYLINDRICAL PIN for alignment and the 0769123894: TYPE PLATE for identification. Always verify housing compatibility using the 4660101012: TRANSMISSION HOUSING or 4660301020: HOUSING as reference points.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101012 | TRANSMISSION HOUSING | Encloses gear train and supports bearing loads |
| 4660301020 | HOUSING | Secondary casing for auxiliary gear sets |
| 0631306174 | CYLINDRICAL PIN | Precision alignment dowel for gear positioning |
| 0769123894 | TYPE PLATE | Identification tag for transmission model |
| 4660221012 | SUCTION TUBE | Oil pickup channel for lubrication system |
| 0634100317 | O-RING | Seals fluid passages between housings |
| 0636103273 | CAP SCREW | Fastener for securing housing sections |
| 0750100022 | SCREW PLUG | Seals drain or fill ports |
| 4660101804 | TRANSMISSION HOUSING | Alternate housing variant for WG92 |
| 4660301008 | HOUSING | Alternate secondary housing option |
ZF 4660.305.003 HELICAL GEAR – Gear RFQ Support
ZF 4660.305.003 HELICAL 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 4660.305.003 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 | 4660.305.003 |
|---|---|
| Normalized SKU | 4660305003 |
| Part name | HELICAL 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: diagram. 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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