Overview
The ZF 4616.301.127 RING is a precision-engineered sealing component designed for the WG65 series of heavy-duty transmissions. This OEM genuine part sits within the rotating assembly, functioning as a critical interface between the OUTPUT shaft and the OUTPUT FLANGE, ensuring proper alignment and preventing fluid migration under high torque conditions. Manufactured to ZF’s exacting tolerances, SKU 4616.301.127 maintains hydraulic pressure integrity within the gear train, directly influencing shift quality and overall transmission longevity. Its robust construction resists deformation from thermal cycling and mechanical stress, making it indispensable for maintaining drivetrain reliability in demanding industrial applications.
Symptoms of Failure
- Oil leaks around the output shaft seal area — When the 4616.301.127 RING wears, transmission fluid seeps past the HEXAGON SCREW mounting points, leaving visible drips on the bell housing or under the vehicle.
- Gear slipping under load — A degraded ring reduces clamping force on the output flange, causing intermittent power loss during acceleration or uphill operation.
- Abnormal whining or grinding noises — Worn ring material allows metal-on-metal contact between the TRANSMISSION HOUSING and rotating components, producing audible distress signals.
- Erratic shift timing — Hydraulic pressure fluctuations from a failing ring disrupt clutch pack engagement, leading to delayed or harsh gear changes.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.301.127 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Inner Diameter | 85.0 mm |
| Outer Diameter | 110.0 mm |
| Thickness | 8.5 mm |
| Weight | 0.28 kg |
| OEM Reference | ZF 4616.301.127 |
Compatibility
This ring is specifically engineered for the ZF WG65 series, which includes models such as WG65, WG80, WG100, WG120, WG150, WG180, and WG200. It is also compatible with select variants of the ZF Ecomat and Ecolife transmissions that share the same output shaft architecture. Always verify your transmission’s serial number against the OEM parts catalog to confirm fitment before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from gearset to flange |
| 4616203017 | OUTPUT FLANGE | Connects driveshaft to transmission output |
| 4616101117 | TRANSMISSION HOUSING | Encloses and supports internal components |
| 0636011038 | HEXAGON SCREW | Secures housing and flange assemblies |
| 0636016015 | HEXAGON SCREW | Fastens output flange to shaft |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals hydraulic passages in valve body |
| 0732611049 | FILTER INSERT | Removes contaminants from transmission fluid |
| 0634303718 | O-RING | Prevents leaks at output flange interface |
| 0636610082 | STUD | Provides threaded mounting for housing bolts |
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