Overview
The ZF 0730.060.028 INTERMEDIATE RING is a precision-engineered OEM genuine component designed exclusively for the ZF WG150 series transmission. This critical spacer ring sits between the planetary gear set and the transmission housing, ensuring correct axial clearance and load distribution during operation. As a factory-original part, SKU 0730.060.028 guarantees exact fitment and material integrity, preventing premature wear in high-torque applications. When installed alongside a TRANSMISSION HOUSING (4642101047) or a TRANSMISSION HOUSING (4642301207), this intermediate ring maintains the precise alignment required for smooth power transfer in heavy-duty industrial drivelines.
Symptoms of Failure
- Oil leaks around the intermediate housing joint – A worn or deformed 0730.060.028 ring can cause transmission fluid to seep past the seal, leading to low oil levels and overheating.
- Gear slipping under load – When the intermediate ring loses its dimensional stability, axial play increases, allowing clutch packs to disengage unexpectedly during acceleration.
- Metallic grinding noises from the transmission bell housing – Excessive clearance from a fatigued ring allows gear teeth to contact the housing, producing a distinct grinding sound during shifting.
- Vibration during torque converter lockup – A compromised intermediate ring disrupts the concentric alignment of rotating assemblies, causing noticeable driveline shudder at highway speeds.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0730.060.028 |
| Material | Case-hardened steel (DIN 1.7131) |
| Outer Diameter | 180 mm |
| Inner Diameter | 150 mm |
| Thickness | 6.0 mm |
| Weight | 0.42 kg |
| OEM Reference | ZF 0730.060.028 |
| Surface Finish | Ground, Rz ≤ 6.3 µm |
Compatibility
This intermediate ring is specifically engineered for the ZF WG150 series transmission. It is also compatible with the closely related WG180 and WG200 models, as these share the same planetary carrier and housing interface dimensions. For proper identification, always verify the TYPE PLATE (0730365067) on your transmission to confirm the exact series. The ring is secured in place using a GROOVED STUD (0631311009), which must be torqued to factory specifications during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4642301207 | TRANSMISSION HOUSING | Alternate housing variant for WG150 |
| 0730365067 | TYPE PLATE | Identification plate with serial number |
| 0631311009 | GROOVED STUD | Fastener for intermediate ring retention |
| 4642301168 | SCREEN SHEET | Oil filter screen for hydraulic circuit |
| 4642301169 | SCREEN SHEET | Fine-mesh filter screen variant |
| 0636100621 | HEXAGON SCREW | M10 bolt for housing assembly |
| 4642301186 | SCREEN SHEET | Coarse-mesh pre-filter screen |
| 4644106300 | SHIFT SYSTEM | Hydraulic valve body assembly |
| 4644306500 | COVER PLATE | Sealing cover for shift system access |
