Overview
The ZF 4644.303.560 SPUR GEAR is a critical power transmission component engineered specifically for the WG 201 series transmissions. This OEM genuine part, identified by SKU 4644.303.560, operates within the gear train to transfer rotational force between parallel shafts, ensuring smooth torque delivery and precise speed regulation. Positioned inside the main transmission housing, this spur gear meshes directly with adjacent gears to maintain driveline integrity under heavy loads. For complete assembly integrity, this gear is often installed alongside the 4644101160: TRANSMISSION HOUSING and the 4644301323: TRANSMISSION HOUSING, which provide the structural enclosure for the gear set.
Symptoms of Failure
When the ZF 4644.303.560 spur gear begins to wear, operators may notice distinct performance issues. Gear whining or grinding noises during acceleration or deceleration often indicate tooth surface degradation. Intermittent gear slipping under load, particularly when shifting between forward and reverse, signals worn tooth profiles. Metallic debris in the transmission fluid is a clear indicator of spalling or pitting on the gear teeth. Additionally, vibration through the drivetrain at specific RPM ranges suggests uneven wear patterns that require immediate attention. Ignoring these symptoms can lead to catastrophic failure of the 4644301189: THREADED BUSH and other internal components.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.303.560 |
| Gear Type | Spur Gear, Helical Cut |
| Material | Case-Hardened Alloy Steel (20MnCr5) |
| Outside Diameter | 142.0 mm |
| Root Diameter | 118.5 mm |
| Number of Teeth | 38 |
| Module | 3.5 |
| Face Width | 32.0 mm |
| Bore Diameter | 45.0 mm |
| Weight | 1.85 kg |
| OEM Reference | ZF 4644.303.560 |
| Hardness | 58-62 HRC |
Compatibility
This spur gear is primarily designed for the ZF WG 201 series transmissions, including the WG201, WG202, and WG203 variants. It is also compatible with the WG180 and WG200 series when used in specific gear train configurations. The gear interfaces directly with the 4475280043: SCREW PLUG assembly points within the housing. For optimal performance, always verify the tooth count and module against your transmission’s existing gear set. This part is not backward-compatible with older WG150 or WG160 series without modification to the shaft splines.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Encloses gear train and supports bearings |
| 4644301323 | TRANSMISSION HOUSING | Secondary housing section for gear alignment |
| 4644301189 | THREADED BUSH | Provides threaded mounting point for sensors |
| 4475280043 | SCREW PLUG | Seals oil passages and inspection ports |
| 0634306198 | O-RING | Prevents fluid leaks at housing joints |
| 0730365067 | TYPE PLATE | Identifies transmission model and serial number |
| 4644301161 | COVER PLATE | Protects internal components from debris |
| 0636100621 | HEXAGON SCREW | Secures housing sections together |
| 0631610020 | SET SCREW | Locks gear position on shaft |
| 0501218540 | BREATHER | Equalizes internal pressure and vents moisture |
ZF 4644.303.560 SPUR GEAR – Gear RFQ Support
Use ZF 4644.303.560 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 4644.303.560 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 | 4644.303.560 |
|---|---|
| Normalized SKU | 4644303560 |
| 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
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- 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
