Overview
The ZF 4644.303.545 OUTPUT SHAFT is a critical driveline component engineered specifically for the WG 200 Series heavy-duty transmission. This OEM genuine part transmits rotational torque from the planetary gearset to the vehicle’s drive shaft, ensuring precise power delivery under extreme loads. Located at the rear of the transmission housing, the output shaft interfaces directly with the TRANSMISSION HOUSING (4644101232) and the TRANSMISSION HOUSING (4644301282) to maintain proper alignment and sealing. The SKU 4644.303.545 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn or damaged shafts in WG200 applications.
Symptoms of Failure
- Oil leaks at the rear seal area: A worn output shaft bearing journal allows excessive play, damaging the seal and causing transmission fluid to drip from the tail housing.
- Vibration during acceleration: When the splines or bearing surfaces degrade, driveline vibration becomes noticeable, especially between 40–60 km/h under load.
- Gear slipping or delayed engagement: A damaged output shaft can misalign the planetary carrier, leading to erratic shifting or complete loss of drive in forward gears.
- Metallic debris in the oil pan: Flaking or spalling on the shaft surface introduces metal particles into the lubrication system, often accompanied by a whining noise.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4644.303.545 |
| OEM Reference | ZF 4644 303 545 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 485 mm (estimated) |
| Spline Diameter | 42 mm (estimated) |
| Weight | 8.2 kg (estimated) |
| Surface Treatment | Black oxide / phosphate coating |
| Sealing Interface | Compatible with O-RING (0634306198) |
| Fastener Torque Spec | Use SCREW PLUG (4475280043) for retention |
Compatibility
This output shaft is designed for the ZF WG 200 Series transmission family. Based on its spline count and bearing dimensions, it is compatible with the following models: WG180, WG200, and WG210. It may also fit select WG150 variants with the same rear housing configuration. Always verify the transmission serial number against the original part before ordering. The shaft works in conjunction with the COVER PLATE (4644301298) and the COVER PLATE (4644306507) to enclose the rear bearing cavity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101232 | TRANSMISSION HOUSING | Main structural casing for gearset |
| 4644301282 | TRANSMISSION HOUSING | Rear housing section for output shaft |
| 4475280043 | SCREW PLUG | Seals oil passages in housing |
| 0634306198 | O-RING | Seals shaft-to-housing interface |
| 0730365067 | TYPE PLATE | Identification tag for transmission |
| 4644301298 | COVER PLATE | Encloses rear bearing cavity |
| 4644106301 | SHIFT SYSTEM | Controls gear engagement |
| 4644306507 | COVER PLATE | Secondary housing cover |
| 4644159302 | SHIFT SYSTEM | Pneumatic shift actuator assembly |
| 4644306560 | VALVE BLOCK | Hydraulic control manifold |
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