Overview
The ZF 4616.303.094 QUILL SHAFT is a precision-machined internal component designed for the WG 65 series of heavy-duty transmissions. This shaft acts as a critical torque-transfer interface, aligning the clutch pack and output assembly within the gear train. As an OEM genuine part, SKU 4616.303.094 ensures exact fitment and metallurgical integrity, reducing the risk of premature wear. It sits directly between the 4616105415: OUTPUT and the 4616101094: TRANSMISSION HOUSING, providing the necessary rotational support for smooth power delivery.
Symptoms of Failure
When the quill shaft wears, operators often notice distinct operational issues. Look for these specific failure indicators:
- Oil leaks near the output flange: Worn shaft surfaces compromise the seal seat, causing fluid to weep past the 0636011038: HEXAGON SCREW mounting points.
- Gear slipping under load: A fatigued quill shaft cannot maintain proper clutch pack alignment, leading to intermittent torque loss during acceleration.
- Vibration or whining noise: Bearing surface degradation on the shaft creates harmonic disturbances, especially at highway speeds.
- Hard shifting or delayed engagement: Internal play from a worn shaft affects hydraulic pressure timing, causing erratic gear changes.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4616.303.094 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 285 mm |
| Outer Diameter (bearing journal) | 45 mm |
| Weight | 2.8 kg |
| OEM Reference | ZF 4616.303.094 |
| Surface Finish | Ground & polished (Ra ≤ 0.4 µm) |
Compatibility
This quill shaft is engineered for the WG 65 Series transmission family. Based on its design geometry, it also fits the following ZF models: WG180, WG200, WG250, and WG300 (when used with the corresponding 4616303144: OUTPUT FLANGE). Always verify your transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105415 | OUTPUT | Transfers torque from quill shaft to driveline |
| 4616303144 | OUTPUT FLANGE | Connects output shaft to propeller shaft |
| 4616101094 | TRANSMISSION HOUSING | Encloses and supports the gear train |
| 0636011038 | HEXAGON SCREW | Secures housing to bell housing |
| 0636011118 | HEXAGON SCREW | Fastens output flange to shaft |
| 0636016015 | HEXAGON SCREW | Mounts bearing retainer plate |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals quill shaft bore against oil leakage |
| 0732611049 | FILTER INSERT | Traps debris in lubrication circuit |
| 0634303718 | O-RING | Seals output flange to housing |
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