Overview
The ZF 4644.103.448 OUTPUT for WG200 is a critical driveline component engineered to transfer rotational force from the transmission’s planetary gearset to the output shaft. Situated at the rear of the WG 200 series housing, this OEM genuine part ensures precise torque delivery under heavy-duty conditions. The SKU 4644.103.448 is machined to exact ZF tolerances, guaranteeing a secure interface with the output flange and disconnection assembly. Without this component, the transmission cannot effectively transmit power to the differential, making it essential for maintaining vehicle mobility in construction, mining, and municipal applications.
Symptoms of Failure
When the ZF 4644.103.448 OUTPUT begins to wear, operators often notice oil leaks around the rear transmission seal, a common long-tail search query for WG200 failures. Another frequent symptom is gear slipping under load, particularly during acceleration or hill climbing, as the output loses its grip on the planetary carrier. You may also detect unusual vibration or whining noise from the transmission housing, indicating bearing wear or spline degradation. Finally, difficulty engaging or disengaging the PTO can occur, as the output’s alignment shifts, affecting the 4644105414: DISCONNECTION mechanism’s operation.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4644.103.448 |
| Material | Case-hardened alloy steel (16MnCr5) |
| Weight | 2.85 kg (6.28 lbs) |
| Outer Diameter | 120 mm |
| Length | 185 mm |
| Spline Count | 24 internal splines |
| OEM Reference | ZF 4644.103.448 |
| Torque Capacity | 2,200 Nm |
Compatibility
This output is primarily designed for the ZF WG 200 series, including models WG180, WG200, and WG210. It also fits select WG150 variants with the same spline configuration. The part integrates directly with the 4644303409: OUTPUT FLANGE and is secured using the 0636021083: HEXAGON SCREW. For full assembly, the 4644101222: TRANSMISSION HOUSING must be correctly aligned to prevent premature wear. Always verify your transmission’s serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105414 | DISCONNECTION | Engages/disengages PTO power |
| 4644303409 | OUTPUT FLANGE | Connects output to driveshaft |
| 0636021083 | HEXAGON SCREW | Secures output flange to shaft |
| 4644101222 | TRANSMISSION HOUSING | Encloses gearset and output |
| 4644301226 | TRANSMISSION HOUSING | Alternate housing variant |
| 0730365067 | TYPE PLATE | Identification label for model |
| 0631311009 | GROOVED STUD | Alignment pin for housing |
| 4644301298 | COVER PLATE | Seals rear access port |
| 0634306525 | O-RING | Prevents oil leakage |
| 0636305026 | SCREW PLUG | Closes drain/fill ports |
