Overview
The ZF 4644.303.567 OUTPUT FLANGE is a critical driveline component engineered specifically for the WG 201 Series transmission. This OEM genuine part serves as the primary interface between the transmission output shaft and the driveshaft, transferring rotational torque from the gearbox to the vehicle’s axles. Machined from high-strength alloy steel, the flange ensures precise alignment and vibration-free power delivery under heavy-duty loads. The SKU 4644.303.567 is factory-tested to meet ZF’s strict tolerances, making it a direct replacement for worn or damaged units in commercial and industrial applications.
Symptoms of Failure
When the ZF 4644.303.567 OUTPUT FLANGE degrades, operators may notice these specific failure indicators:
- Oil leaks at the output seal area – A worn flange spline or damaged mating surface allows transmission fluid to escape, often seen as drips near the rear of the gearbox.
- Driveline vibration during acceleration – Excessive play between the flange and output shaft causes imbalance, leading to shuddering or humming at highway speeds.
- Gear engagement difficulty or slipping – Misalignment from a cracked flange can prevent the transmission from fully locking into gear, resulting in erratic shifting.
- Metallic debris in the transmission fluid – Flange wear generates fine metal particles that contaminate the oil, accelerating damage to internal components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.303.567 |
| Material | Alloy Steel (40CrMnMoS8-6) |
| Outer Diameter | 180 mm |
| Inner Spline Diameter | 45 mm |
| Overall Length | 95 mm |
| Weight | 2.8 kg |
| OEM Reference | ZF 4644.303.567 |
| Torque Capacity | 1,200 Nm |
Compatibility
This output flange is designed for the WG 201 Series transmission family, which includes models such as WG180, WG200, and WG211. It also fits select variants of the WG150 and WG250 series where the output shaft spline configuration matches. Always verify your transmission’s serial number against the OEM parts catalog before installation.
During replacement, technicians often inspect or replace the TRANSMISSION HOUSING (4644101160) and TRANSMISSION HOUSING (4644301323) to ensure proper alignment. The THREADED BUSH (4644301189) and SCREW PLUG (4475280043) are also commonly replaced alongside the flange to prevent future leaks and secure the assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Encloses and supports gear train |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing for WG200 series |
| 4644301189 | THREADED BUSH | Provides threaded mounting point |
| 4475280043 | SCREW PLUG | Seals oil passages |
| 0634306198 | O-RING | Prevents fluid leaks at joints |
| 0730365067 | TYPE PLATE | Identifies transmission model |
| 4644301161 | COVER PLATE | Protects internal components |
| 0636100621 | HEXAGON SCREW | Fastens housing sections |
| 0631610020 | SET SCREW | Locks adjustment points |
| 0501218540 | BREATHER | Equalizes internal pressure |
