Overview
The ZF 0730.004.939 WASHER is a precision-engineered sealing component designed for the WG 65 series transmission. This OEM genuine part functions as a critical load-spreading and sealing interface between fasteners and transmission housing surfaces, preventing fluid migration and maintaining clamping force under high-torque conditions. Positioned within the output assembly, the SKU 0730.004.939 works in conjunction with the 4616105415: OUTPUT and the 4616303144: OUTPUT FLANGE to ensure proper alignment and leak-free operation. Its hardened steel construction resists deformation from repeated thermal cycling, making it essential for long-term transmission reliability.
Symptoms of Failure
- Oil seepage at output flange interface: A worn 0730.004.939 washer allows transmission fluid to escape past the 4616101094: TRANSMISSION HOUSING joint, leaving visible drips under the vehicle.
- Torque loss on hexagon screw fasteners: When the washer compresses beyond its elastic limit, 0636011038: HEXAGON SCREW connections loosen, causing audible rattling or vibration during gear engagement.
- Intermittent gear slipping under load: Reduced clamping force from a collapsed washer alters output shaft endplay, leading to delayed engagement or momentary power loss in WG65 transmissions.
- Metallic debris in transmission fluid: A fractured washer sheds particles that contaminate the hydraulic circuit, accelerating wear on adjacent components.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0730.004.939 |
| Material | Hardened spring steel (DIN 17222) |
| Outer Diameter | 38.0 mm |
| Inner Diameter | 18.5 mm |
| Thickness | 3.2 mm |
| Weight | 0.018 kg |
| OEM Reference | ZF 0730.004.939 |
| Surface Finish | Zinc-plated (ISO 4042) |
Compatibility
This washer is engineered for the ZF WG 65 series, but its design parameters also suit the WG180, WG200, and WG250 transmission families. It is a direct replacement for the sealing washer used in output flange assemblies across these models. Always verify fitment by cross-referencing the 0730.004.939 with your transmission’s parts manual, as variations exist in early-production WG65 units.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105415 | OUTPUT | Transfers torque from planetary gears to driveshaft |
| 4616303144 | OUTPUT FLANGE | Connects output shaft to driveline yoke |
| 4616101094 | TRANSMISSION HOUSING | Encloses gearset and hydraulic components |
| 0636011038 | HEXAGON SCREW | Secures output flange to transmission housing |
| 0636011118 | HEXAGON SCREW | Fastens cover plate to housing |
| 0636016015 | HEXAGON SCREW | Mounts valve body to housing |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals oil pump suction line |
| 0732611049 | FILTER INSERT | Captures debris from hydraulic fluid |
| 0634303718 | O-RING | Seals output flange to housing bore |
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