Overview
The ZF 0730.062.866 INTERMEDIATE RING is a precision-engineered OEM genuine component designed for the WG65 series of heavy-duty transmissions. This critical spacer ring sits between the planetary gear set and the transmission housing, ensuring correct axial clearance and load distribution during high-torque operations. As an OEM part, SKU 0730.062.866 guarantees exact fitment and metallurgical consistency, eliminating the risk of premature wear found in aftermarket alternatives. Proper installation of this intermediate ring is essential for maintaining gear alignment and preventing metal-to-metal contact within the rotating assembly.
Symptoms of Failure
- Oil leaks around the intermediate housing joint – When the 0730.062.866 ring deforms or develops surface cracks, transmission fluid can escape past the sealing surfaces, leaving visible drips under the vehicle.
- Gear slipping under load – A worn intermediate ring reduces clamping force on the planetary carrier, causing intermittent power loss during acceleration or hill climbs.
- Abnormal whining or grinding noises – As the ring loses its dimensional stability, the gear train shifts out of alignment, producing metallic sounds that intensify with RPM.
- Delayed engagement when shifting – Excessive clearance from a compressed ring allows the clutch packs to drag, resulting in sluggish gear changes and harsh engagement.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0730.062.866 |
| Material | High-strength alloy steel (case-hardened) |
| Outer Diameter | 186 mm (7.32 in) |
| Inner Diameter | 152 mm (5.98 in) |
| Thickness | 8.5 mm (0.335 in) |
| Weight | 0.42 kg (0.93 lb) |
| OEM Reference | ZF 0730.062.866 |
| Surface Finish | Ground, phosphate-coated |
Compatibility
This intermediate ring is specifically engineered for the ZF WG65 series, including models WG65, WG80, WG120, WG150, WG180, and WG200. It is also compatible with select ZF Ecomat 4HP and 5HP transmissions that share the same planetary carrier architecture. Always verify your transmission serial number before ordering.
Installation Context
When replacing the 0730.062.866 ring, it is strongly recommended to inspect and replace the 4616105402 OUTPUT shaft and the 4005303005 OUTPUT FLANGE to ensure proper torque transfer. The ring seats directly against the 4616101119 TRANSMISSION HOUSING, which must be free of burrs. Secure the assembly using 0636011038 HEXAGON SCREW fasteners torqued to factory specifications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105402 | OUTPUT | Transfers torque from planetary carrier to driveshaft |
| 4005303005 | OUTPUT FLANGE | Connects output shaft to driveline yoke |
| 4616101119 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0636011038 | HEXAGON SCREW | Secures intermediate ring to housing |
| 0636011118 | HEXAGON SCREW | Fastens output flange to shaft |
| 0636016015 | HEXAGON SCREW | Mounts housing cover plate |
| 0631306085 | CYLINDRICAL PIN | Aligns intermediate ring during assembly |
| 0634313118 | O-RING | Seals oil passage between ring and housing |
| 0636304019 | SCREW PLUG | Closes inspection port on housing |
| 0634801152 | SEALING RING | Prevents fluid loss at output shaft |
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