Overview
The ZF 4616.330.007 RING is a precision-engineered internal component designed specifically for the WG 65 series of heavy-duty transmissions. This OEM genuine part functions as a critical sealing and alignment element within the planetary gear set assembly, ensuring proper clearance and preventing contamination between rotating and stationary surfaces. The 4616.330.007 ring is manufactured to exacting ZF tolerances to maintain hydraulic pressure integrity and reduce frictional wear. When installed alongside a robust TRANSMISSION HOUSING, this ring contributes directly to the overall durability and shift quality of the transmission system.
Symptoms of Failure
- Hydraulic pressure loss and erratic shifting: A worn 4616.330.007 ring can allow pressurized fluid to bypass the intended circuit, leading to soft or delayed gear engagement, particularly under load.
- Metallic debris in transmission fluid: As the ring surface degrades, small particles of hardened steel or bronze may contaminate the oil, often visible during routine drain intervals.
- Audible whining or grinding from the gear train: Excessive clearance caused by ring wear permits metal-on-metal contact between planetary components, generating a distinct high-pitched noise during acceleration.
- External oil seepage near the housing joint: A compromised ring can disrupt the seal between the HOUSING and the main case, resulting in slow leaks that worsen over time.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4616.330.007 |
| Material | Hardened Alloy Steel (C45E / 1.1191) |
| Outer Diameter | 185.0 mm |
| Inner Diameter | 165.0 mm |
| Thickness | 4.5 mm |
| Weight | 0.34 kg |
| OEM Reference | ZF 4616.330.007 |
| Surface Finish | Ground, Rz ≤ 6.3 µm |
Compatibility
This 4616.330.007 ring is engineered for the ZF WG 65 series transmission family. It is directly compatible with models including the WG65, WG120, WG150, WG180, and WG200, where it serves as a spacer and seal carrier within the rear planetary carrier assembly. For proper installation, the ring must be paired with the correct HEXAGON SCREW torque specifications and a matching HOUSING to ensure concentric alignment. Always verify your transmission serial number against ZF parts catalogs before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101116 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0636011118 | HEXAGON SCREW | Fastener for housing assembly |
| 4616301307 | HOUSING | Planetary carrier housing component |
| 4616301309 | HOUSING | Rear housing section for clutch pack |
| 0636011038 | HEXAGON SCREW | M10 bolt for cover plate |
| 0636016015 | HEXAGON SCREW | M12 bolt for flange mounting |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing |
| 0634313118 | O-RING | Hydraulic seal for piston bore |
| 0636304019 | SCREW PLUG | Oil gallery sealing plug |
| 0634801152 | SEALING RING | Static seal for flange joint |
