Overview
The ZF 4657.304.018 QUILL SHAFT is a precision-machined component engineered for the WG210 series of heavy-duty automatic transmissions. This OEM genuine part functions as the central torque-transfer interface within the gearset, aligning the clutch packs and planetary carriers to ensure smooth power delivery. The SKU 4657.304.018 is specifically designed to withstand high torsional loads and thermal cycling, making it critical for maintaining driveline integrity. It sits directly within the main shaft assembly, interfacing with the TRANSMISSION HOUSING to provide precise rotational support.
Symptoms of Failure
When the 4657.304.018 QUILL SHAFT begins to wear, operators may notice specific performance degradation. Common failure symptoms include:
- Erratic gear engagement or slipping – Worn splines or surface pitting cause intermittent torque loss during shifts.
- Metallic debris in transmission fluid – Flaking material from the shaft contaminates the oil, often detected during routine filter changes.
- Abnormal whining or grinding noise – Increased clearance between the quill shaft and mating components produces audible high-frequency sounds under load.
- Oil leaks near the bell housing – A damaged shaft can compromise the seal interface, leading to fluid seepage around the HOUS.FRONT SECT.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.304.018 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 285 mm |
| Outer Diameter | 42 mm |
| Spline Count | 24 (involute) |
| Weight | 1.85 kg |
| OEM Reference | ZF 4657.304.018 |
| Hardness | 58-62 HRC |
Compatibility
This quill shaft is primarily validated for the WG210 transmission series, but it also fits select variants in the WG180, WG200, and WG250 families due to shared spline geometry. It is a direct replacement for units requiring a 24-spline output shaft. For proper installation, ensure the HOUSING REAR PART is free of wear, and verify alignment with the CYLINDRICAL PIN to prevent axial play.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101042 | TRANSMISSION HOUSING | Encloses gearset and supports shaft alignment |
| 4657201028 | HOUS.FRONT SECT | Front section housing for clutch assembly |
| 4657201013 | HOUSING REAR PART | Rear housing section for output shaft support |
| 0631306792 | CYLINDRICAL PIN | Locating pin for precise shaft alignment |
| 0636100801 | CAP SCREW | Fastener for housing retention |
| 4656301148 | FIXING PLATE | Secures quill shaft axial position |
| 4657301034 | SCREEN SHEET | Filter screen for oil flow regulation |
| 4657301035 | SCREEN SHEET | Secondary filter screen for debris protection |
| 0636100803 | CAP SCREW | High-torque fastener for critical joints |
| 4656301048 | OIL FEED.HOUSG. | Distributes lubricant to shaft bearings |
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