Overview
The ZF 4644.303.069 OUTPUT FLANGE is a critical driveline component engineered for the WG 201 series transmission. This OEM genuine part transfers rotational torque from the transmission output shaft to the driveshaft, ensuring precise power delivery in heavy-duty industrial applications. Positioned at the rear of the gearbox, the flange interfaces directly with the 4644101160: TRANSMISSION HOUSING and the 4644301323: TRANSMISSION HOUSING to maintain driveline alignment. The SKU 4644.303.069 is manufactured to ZF’s exacting tolerances, providing a direct replacement that eliminates guesswork during rebuilds.
Symptoms of Failure
- Transmission fluid seepage at the output shaft: A worn output flange often causes oil to leak past the seal, leaving visible drips under the vehicle or machine.
- Driveline vibration during acceleration: Excessive play in the flange splines or mounting surface leads to driveline shudder, especially under load.
- Clunking noise when shifting gears: A loose or damaged output flange creates audible metallic sounds as torque is applied or released.
- Premature bearing wear in the transmission housing: A failing flange can transfer abnormal forces to the 4644301189: THREADED BUSH and adjacent components, accelerating internal damage.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.303.069 |
| Material | High-strength alloy steel, induction-hardened |
| Overall Diameter | 180 mm (approx.) |
| Bolt Hole Circle | 160 mm (approx.) |
| Weight | 2.8 kg (approx.) |
| OEM Reference | ZF 4644.303.069 |
| Seal Surface Finish | Ground to Ra ≤ 0.8 µm |
| Related Seal | 0634306198: O-RING |
| Mounting Hardware | 0636100621: HEXAGON SCREW |
Compatibility
This output flange is designed for the ZF WG 201 series transmission family. Based on its spline count and bolt pattern, it is compatible with WG180, WG200, and WG210 models that share the same output shaft configuration. It also fits select WG150 variants when used with the appropriate 4475280043: SCREW PLUG for oil retention. Always verify the flange’s pilot diameter against your transmission’s rear housing to ensure proper seating.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301323 | TRANSMISSION HOUSING | Rear housing section supporting output shaft |
| 4644301189 | THREADED BUSH | Wear insert for housing bolt threads |
| 4475280043 | SCREW PLUG | Seals oil passages in housing |
| 0634306198 | O-RING | Seals flange-to-housing interface |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 4644301161 | COVER PLATE | Protects rear housing opening |
| 0636100621 | HEXAGON SCREW | Fastens flange to output shaft |
| 0631610020 | SET SCREW | Locks flange position on shaft |
| 0501218540 | BREATHER | Equalizes internal pressure |
