Overview
The ZF 4644.104.414 DIFFERENTIAL is a critical torque-distributing component engineered specifically for the WG 180 and WG 200 series transmissions. This OEM genuine part, identified by SKU 4644.104.414, sits within the final drive assembly, managing rotational speed differences between the left and right output shafts while delivering power from the transmission housing to the axles. Designed to withstand high-load industrial applications, this differential ensures smooth cornering and consistent traction under demanding conditions. For proper alignment and sealing, it integrates with the 4644101043: TRANSMISSION HOUSING and the 4644301194: TRANSMISSION HOUSING, both of which provide the structural foundation for the assembly.
Symptoms of Failure
When the ZF 4644.104.414 differential begins to wear, operators often notice specific performance issues. Look for these failure symptoms to diagnose problems early:
- Oil leaks around the differential housing – Worn seals or bearing surfaces allow transmission fluid to escape, leading to low lubrication levels and potential overheating.
- Gear slipping or clunking during turns – Damaged spider gears or side gears cause erratic power delivery, especially when maneuvering under load.
- Whining or grinding noises from the axle area – Excessive play in the differential bearings or gear teeth produces audible distress signals during operation.
- Uneven tire wear or vibration – A failing differential disrupts torque balance, resulting in driveline shudder and accelerated tread degradation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.104.414 |
| Component Type | Differential Assembly |
| Material | Case-hardened alloy steel |
| Weight | Approx. 18.5 kg (40.8 lbs) |
| Dimensions (L x W x H) | 320 mm x 280 mm x 210 mm |
| OEM Reference | ZF 4644.104.414 (Genuine) |
| Bearing Type | Tapered roller bearings |
| Seal Compatibility | Use 0634801098: SEALING RING or 0634801250: SEALING RING |
Compatibility
This differential is designed for ZF WG 180 and WG 200 series transmissions, commonly found in heavy-duty construction, agricultural, and material handling equipment. It directly replaces the original factory unit in WG180 and WG200 models. For identification purposes, the 0730365067: TYPE PLATE should be consulted to verify transmission series, while the 0631311009: GROOVED STUD is used for secure mounting within the housing assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101043 | TRANSMISSION HOUSING | Encloses and supports the differential assembly |
| 4644301194 | TRANSMISSION HOUSING | Alternative housing variant for WG series |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Fastener for differential mounting |
| 4644303060 | COVER PLATE | Seals the differential access opening |
| 4644303061 | COVER PLATE | Alternate cover plate for service access |
| 0634801098 | SEALING RING | Prevents fluid leakage at joints |
| 0634801250 | SEALING RING | High-temperature sealing ring option |
| 0636305026 | SCREW PLUG | Drain or fill plug for differential cavity |
| 0636305019 | SCREW PLUG | Magnetic screw plug for debris collection |
