Overview
The ZF 0730.107.804 SUPPORTING RING is a precision-engineered OEM genuine component designed for the WG65 series of heavy-duty transmissions. This critical part functions as a structural stabilizer within the planetary gear set assembly, ensuring correct axial clearance and load distribution during high-torque operations. The SKU 0730.107.804 is specifically machined to maintain concentric alignment between the 4616105413: OUTPUT shaft and the 4616101117: TRANSMISSION HOUSING. Without this supporting ring, the entire rotating assembly experiences excessive lateral movement, leading to premature wear on adjacent bearings and seals.
Symptoms of Failure
When the ZF 0730.107.804 supporting ring deteriorates, operators often report intermittent gear engagement difficulty during low-speed maneuvers. A second common failure symptom is metallic grinding noises from the transmission bell housing, indicating the ring has lost its dimensional integrity. Third, you may notice unexplained vibration at the output flange when the transmission is under load, which can be traced back to the ring no longer maintaining proper spacing. Finally, chronic oil contamination with metallic particles frequently occurs as the worn ring abrades against the 4616203017: OUTPUT FLANGE surface.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 0730.107.804 |
| Material | Case-hardened steel (DIN 1.7131) |
| Outer Diameter | 148.5 mm |
| Inner Diameter | 112.0 mm |
| Thickness | 6.35 mm |
| Weight | 0.28 kg |
| OEM Reference | ZF 0730.107.804 |
| Hardness | HRC 58-62 |
Compatibility
This supporting ring is primarily designed for the ZF WG65 series, but it also fits select models in the WG180 and WG200 families when used with the correct 0636011038: HEXAGON SCREW kit. The part is compatible with all WG65 variants produced after 2012, including the WG65-6 and WG65-7 torque converter models. For applications in WG180 transmissions, verify that the 0636016015: HEXAGON SCREW and 0631306085: CYLINDRICAL PIN are also replaced simultaneously to ensure proper clamping force.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from planetary gears to driveshaft |
| 4616203017 | OUTPUT FLANGE | Connects output shaft to driveline yoke |
| 4616101117 | TRANSMISSION HOUSING | Encloses gear train and supports bearing bores |
| 0636011038 | HEXAGON SCREW | Secures supporting ring to housing |
| 0636016015 | HEXAGON SCREW | Fastens output flange to shaft |
| 0631306085 | CYLINDRICAL PIN | Aligns supporting ring during assembly |
| 0634313118 | O-RING | Seals oil passage between ring and housing |
| 0732611049 | FILTER INSERT | Traps debris from worn ring particles |
| 0634303718 | O-RING | Prevents external oil leakage at flange |
| 0636610082 | STUD | Provides threaded mounting point for housing |
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