Overview
The ZF 4616.303.172 OUTPUT SHAFT is a critical torque-transfer component engineered specifically for the WG 65 Series transmission family. This OEM genuine part transmits rotational power from the planetary gear set to the driveline flange, ensuring precise engagement and load distribution under high-stress industrial conditions. Machined from forged alloy steel and induction-hardened at the spline interfaces, the 4616.303.172 shaft interfaces directly with the TRANSMISSION HOUSING and is secured by the HEXAGON SCREW fasteners. As a genuine ZF component, it guarantees exact fitment and metallurgical integrity for WG65 rebuilds and overhauls.
Symptoms of Failure
- Transmission output flange wobble or vibration — A worn or bent output shaft causes noticeable driveline shudder during acceleration, particularly under load.
- Oil seepage at the rear seal area — Scoring on the shaft journal surface compromises the sealing lip, leading to gradual ATF loss around the HOUSING interface.
- Intermittent gear engagement or slipping — Spline wear on the 4616.303.172 shaft prevents positive lock with the clutch hub, causing erratic power delivery.
- Metallic debris in transmission fluid — Flaking or spalling on the shaft bearing race surfaces introduces ferrous particles into the oil circuit.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number (SKU) | 4616.303.172 |
| OEM Reference | ZF 4616.303.172 |
| Overall Length | 385 mm (estimated) |
| Spline Diameter | 42 mm (output end) |
| Material | Forged 42CrMo4 alloy steel, induction hardened |
| Weight | 4.8 kg (10.6 lbs) |
| Surface Finish | Ground bearing journals, shot-peened fillets |
| Sealing Surface | Chrome-plated seal contact area |
Compatibility
This output shaft is designed for the ZF WG 65 Series transmission family, which includes models such as the WG65, WG80, WG120, WG150, WG180, and WG200. It is a direct replacement for units originally equipped with the 4616.303.172 shaft. The shaft integrates with the HOUSING assembly and requires proper torque sequencing using the HEXAGON SCREW during installation. Always verify your transmission serial number against ZF parts catalogs before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101137 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0636011118 | HEXAGON SCREW | Fastener for housing and shaft retention |
| 4616301304 | HOUSING | Rear housing section for output shaft support |
| 4616301309 | HOUSING | Intermediate housing adapter component |
| 0630361069 | SEALING CAP | Protects shaft end from contamination |
| 0636011038 | HEXAGON SCREW | M10 fastener for housing attachment |
| 0636016015 | HEXAGON SCREW | M12 fastener for flange mounting |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing positioning |
| 0634313118 | O-RING | Seals shaft-to-housing oil passage |
| 0636304019 | SCREW PLUG | Closes oil gallery access port |
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