Overview
The ZF 4642.303.002 OUTPUT SHAFT is a critical torque-transmitting component engineered specifically for the WG 150 Series transmission. This OEM genuine part transfers rotational force from the planetary gearset to the driveline flange, ensuring smooth power delivery under heavy-duty industrial loads. Machined from high-tensile alloy steel, the shaft interfaces directly with the TRANSMISSION HOUSING (4642101108) and the TRANSMISSION HOUSING (4642301208) to maintain precise axial alignment. The SKU 4642.303.002 is laser-etched on the shaft shoulder for traceability, matching OEM factory specifications for direct bolt-in replacement without modification.
Symptoms of Failure
- Output flange oil seepage – Worn splines or bearing journal scoring on the 4642.303.002 shaft can compromise the O-RING (0634303340) seal, causing transmission fluid to weep from the rear housing joint.
- Gear slipping under load – Fatigue cracking or torsional deformation of the output shaft leads to intermittent power loss, especially during hill climbs or sudden acceleration in WG150-equipped vehicles.
- Vibration at highway speeds – A bent or unbalanced output shaft produces rhythmic driveline shudder, often misdiagnosed as universal joint wear. This worsens when the SEALING CAP (0630361029) is also degraded.
- Metallic debris in oil pan – Flaking from the shaft’s hardened surface contaminates the lubricant, requiring immediate inspection of the SCREEN SHEET (4642301168) and SCREEN SHEET (4642301169) for particle entrapment.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4642.303.002 |
| Overall Length | 385 mm |
| Spline Major Diameter | 42 mm |
| Bearing Journal Diameter | 35 mm |
| Material | 20MnCr5 case-hardened steel |
| Weight | 4.2 kg |
| OEM Reference | ZF 4642.303.002 |
| Surface Hardness | 58–62 HRC |
| Torque Capacity | 1,200 Nm |
Compatibility
This output shaft is designed for the ZF WG 150 series but also fits the WG 180 and WG 200 transmissions when used with the correct ADAPTER (4642306254). It is compatible with all WG150 variants (WG150-5, WG150-6) produced after 2008. The shaft requires the TYPE PLATE (0730365125) for proper identification during rebuilds and must be secured using the HEXAGON SCREW (0636100621) and GROOVED STUD (0631311009) for flange retention. Always verify spline count (21-tooth) against your existing unit before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Encloses gearset and supports output shaft bearings |
| 4642301208 | TRANSMISSION HOUSING | Rear housing section for WG150 series |
| 0730365125 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Locating pin for output flange alignment |
| 4642301168 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4642301169 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100621 | HEXAGON SCREW | Fastener for output shaft retaining plate |
| 0630361029 | SEALING CAP | Protects output shaft spline during storage |
| 4642306254 | ADAPTER | Flange adapter for non-standard drivelines |
| 0634303340 | O-RING | Seals output shaft bore against oil leaks |
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