Overview
The ZF 4644.103.204 OUTPUT for WG200 is a critical drivetrain component designed to transfer rotational force from the transmission’s planetary gearset to the output shaft. This OEM genuine part, identified by SKU 4644.103.204, sits at the rear of the ZF WG200 series transmission housing, directly interfacing with the flange that connects to the drive shaft. It ensures precise torque delivery and maintains proper alignment within the assembly. When replacing this output, it is essential to inspect the 4644101180: TRANSMISSION HOUSING for cracks or wear, as the housing provides the structural foundation for the output’s seating. Additionally, the 4644301225: TRANSMISSION HOUSING variant may be used in specific WG200 configurations, requiring verification of the exact housing type during installation.
Symptoms of Failure
When the ZF 4644.103.204 OUTPUT begins to degrade, operators often notice specific performance issues. Common failure symptoms include:
- Oil leaks at the output shaft seal: Worn splines or bearing surfaces allow transmission fluid to escape, leaving puddles under the vehicle.
- Gear slipping under load: A damaged output cannot maintain positive engagement, causing the transmission to slip out of gear during acceleration or hill climbs.
- Vibration or driveline shudder: Misalignment from a fatigued output creates harmonic vibrations that worsen at highway speeds.
- Clunking noises during shifting: Excessive play in the output splines produces audible metallic sounds when the transmission changes gears.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4644.103.204 |
| Material | Case-hardened alloy steel |
| Weight | 2.8 kg (6.2 lbs) |
| Length | 185 mm |
| Output Spline Count | 32 |
| OEM Reference | ZF 4644.103.204 |
| Torque Capacity | 1,200 Nm |
Compatibility
This output is engineered for the ZF WG200 series of powershift transmissions, commonly found in heavy-duty construction and agricultural machinery. It is also compatible with the WG180 and WG210 models, provided the housing and shift system match. During installation, always verify the 0730365067: TYPE PLATE to confirm the exact transmission variant, as the plate lists the original equipment specifications. Secure the output using the 0631311009: GROOVED STUD, which ensures proper clamping force and prevents loosening under high torque.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101180 | TRANSMISSION HOUSING | Encloses and supports the output and gearset |
| 4644301225 | TRANSMISSION HOUSING | Alternate housing for WG200 variants |
| 0730365067 | TYPE PLATE | Identifies transmission model and specs |
| 0631311009 | GROOVED STUD | Secures output flange to shaft |
| 4644301298 | COVER PLATE | Protects output bearing area from debris |
| 0634306525 | O-RING | Seals output housing to prevent fluid leaks |
| 0636305026 | SCREW PLUG | Closes oil passages in the output area |
| 4644301279 | SCREEN SHEET | Filters debris from output lubrication oil |
| 4644301088 | SEALING CAP | Prevents contamination at output shaft end |
| 4644106300 | SHIFT SYSTEM | Controls gear engagement linked to output |
