Overview
The ZF 4644.103.063 OUTPUT for WG200 is a critical driveline component engineered to transfer rotational force from the transmission’s planetary gear set to the output flange. Positioned at the rear of the main casing, this OEM genuine part ensures precise torque delivery and maintains proper alignment within the WG 200 series. The SKU 4644.103.063 is manufactured to ZF’s exacting tolerances, providing a direct replacement that restores factory performance. When paired with a robust TRANSMISSION HOUSING (4644101223) or a TRANSMISSION HOUSING (4644301225), this output shaft assembly ensures seamless power flow and extended service life in heavy-duty applications.
Symptoms of Failure
When the ZF 4644.103.063 output component begins to degrade, operators may notice specific performance issues. Look for these failure indicators to catch problems early:
- Oil seepage at the rear seal area – Worn output shafts often cause transmission fluid to leak past the seal, leaving puddles under the vehicle.
- Vibration during acceleration – A damaged output can create driveline shudder, especially under load, indicating bearing or spline wear.
- Gear engagement hesitation – Delayed or rough shifting may occur if the output shaft’s splines are stripped or misaligned.
- Unusual whining noise – A high-pitched sound from the transmission’s rear section often points to output bearing failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.103.063 |
| Material | Case-hardened alloy steel |
| Overall Length | 285 mm |
| Output Flange Diameter | 120 mm |
| Spline Count | 24 (internal) |
| Weight | 4.2 kg |
| OEM Reference | ZF 4644.103.063 |
| Surface Finish | Phosphate coated |
Compatibility
This genuine ZF output is designed primarily for the WG 200 series transmissions, including models such as WG180, WG200, and WG210. It also fits select variants of the Ecomat 4HP and 5HP families where the output flange configuration matches. For proper installation, ensure the mating TYPE PLATE (0730365125) is correctly affixed to the housing, and verify alignment with the COVER PLATE (4644301298) to prevent fluid leaks. Always cross-reference your transmission’s serial number with ZF’s documentation before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101223 | TRANSMISSION HOUSING | Encloses gear sets and supports shafts |
| 4644301225 | TRANSMISSION HOUSING | Alternate housing for WG200 variants |
| 0730365125 | TYPE PLATE | Identifies transmission model and specs |
| 4644301298 | COVER PLATE | Seals rear access opening |
| 0634306525 | O-RING | Prevents fluid leakage at joints |
| 0636305026 | SCREW PLUG | Closes oil drain or fill ports |
| 4644301279 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4644301088 | SEALING CAP | Protects unused openings |
| 4644106319 | SHIFT SYSTEM | Controls gear selection mechanism |
| 4644159300 | SHIFT SYSTEM | Alternate shift assembly for WG200 |
