Overview
The ZF 4644.103.212 OUTPUT for WG200 is a critical drivetrain component engineered to transfer rotational force from the transmission’s planetary gear set to the output shaft, ensuring smooth power delivery in heavy-duty industrial applications. Positioned at the rear of the ZF WG200 series transmission, this OEM genuine part interfaces directly with the OUTPUT FLANGE and the TRANSMISSION HOUSING to maintain precise alignment under high torque loads. The SKU 4644.103.212 is manufactured to ZF’s exacting tolerances, providing a direct replacement that eliminates guesswork during rebuilds. Its robust construction withstands continuous stress in construction, mining, and material handling equipment, making it indispensable for fleet operators seeking maximum uptime.
Symptoms of Failure
When the ZF 4644.103.212 OUTPUT begins to wear, operators often notice oil leaks around the rear transmission seal due to degraded bearing surfaces. A second common failure symptom is gear slipping under load, particularly during acceleration or hill climbs, as the output component loses its ability to maintain positive engagement. Third, unusual vibration or whining noise from the driveline typically indicates excessive play between the output shaft and the DISCONNECTION assembly. Finally, intermittent loss of power to the wheels may occur, often misdiagnosed as a torque converter issue, when the output component’s splines become stripped or fatigued. Addressing these signs early with the genuine 4644.103.212 part prevents cascading damage to the TRANSMISSION HOUSING and related drivetrain elements.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.103.212 |
| Material | High-strength alloy steel (case-hardened) |
| Weight | 2.8 kg (6.2 lbs) |
| Overall Length | 185 mm |
| Spline Count | 28 internal splines |
| OEM Reference | ZF 4644.103.212 |
| Torque Capacity | 1,200 Nm (885 lb-ft) |
| Surface Treatment | Phosphate coating for corrosion resistance |
Compatibility
This output component is specifically designed for the ZF WG200 series transmissions, including the WG180, WG200, and WG210 variants commonly found in off-highway trucks, wheel loaders, and agricultural tractors. It also fits select ZF Ecomat models with similar output configurations. The 4644.103.212 integrates with the HEXAGON SCREW fasteners used to secure the output flange, ensuring a vibration-resistant assembly. For complete rebuilds, verify compatibility with your transmission’s serial number to confirm fitment with the OUTPUT FLANGE and DISCONNECTION components.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105423 | DISCONNECTION | Engages/disengages output shaft from driveline |
| 4644303054 | OUTPUT FLANGE | Connects output shaft to driveshaft yoke |
| 0636021010 | HEXAGON SCREW | Secures output flange to output component |
| 4644101229 | TRANSMISSION HOUSING | Encloses gear train and output assembly |
| 4644301227 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 4475280078 | ADAPTER | Adapts output flange to non-standard yokes |
| 0730365067 | TYPE PLATE | Identifies transmission model and serial number |
| 0631311009 | GROOVED STUD | Positions output component within housing |
| 4644301298 | COVER PLATE | Seals rear access opening in housing |
| 0634306525 | O-RING | Prevents oil leaks at output shaft seal |
