Overview
The ZF 4616.302.055 FLANGE is a critical driveline component engineered specifically for the WG 65 Series transmission. This OEM genuine part serves as the output interface, transferring rotational torque from the transmission housing to the driveshaft. Located at the rear of the gearbox, the flange ensures a secure, vibration-resistant connection that maintains alignment under heavy loads. The SKU 4616.302.055 is precision-machined to ZF’s exacting tolerances, making it a direct replacement for worn or damaged units in commercial vehicle applications.
Symptoms of Failure
- Oil leaks at the output seal area: A worn 4616.302.055 flange can cause the sealing surface to degrade, leading to transmission fluid seepage. This is often noticed as drips under the vehicle after parking.
- Driveline vibration during acceleration: When the flange develops play or warpage, it creates imbalance, resulting in noticeable shuddering or shaking at highway speeds.
- Gear engagement hesitation: A damaged flange can misalign the output shaft, causing delayed or rough shifting, particularly in lower gears.
- Metallic grinding noise from the transmission bell housing: Excessive wear on the flange splines produces a distinct grinding sound, indicating imminent failure.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4616.302.055 |
| Material | High-strength forged steel |
| Weight | Approx. 2.4 kg (5.3 lbs) |
| Outer Diameter | 165 mm |
| Bolt Hole Pattern | 8 x M12 on 130 mm PCD |
| OEM Reference | ZF 4616.302.055 |
Compatibility
This flange is designed for the ZF WG 65 Series transmission family. It is also compatible with the WG180, WG200, and WG250 models where the output shaft configuration matches. Always verify the spline count and pilot diameter before installation. The 4616.302.055 is frequently used in municipal buses, refuse trucks, and heavy-duty construction vehicles equipped with these ZF gearboxes.
Installation Notes
Proper installation requires securing the flange to the TRANSMISSION HOUSING using the correct fasteners. Use HEXAGON SCREW (M10 x 30) for primary mounting, HEXAGON SCREW (M12 x 35) for the flange-to-yoke connection, and HEXAGON SCREW (M16 x 45) for heavy-duty applications. Torque specifications must be followed precisely to avoid distortion.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Encloses and supports internal gear sets |
| 0636011038 | HEXAGON SCREW | Secures housing to bell housing |
| 0636011118 | HEXAGON SCREW | Fastens flange to output shaft |
| 0636016015 | HEXAGON SCREW | Heavy-duty mounting bolt |
| 0631306085 | CYLINDRICAL PIN | Aligns flange to shaft |
| 0634313118 | O-RING | Seals flange-to-housing joint |
| 0636304019 | SCREW PLUG | Closes oil passages |
| 0634801152 | SEALING RING | Prevents fluid leaks |
| 0732611049 | FILTER INSERT | Cleans transmission oil |
| 0634303718 | O-RING | Seals filter housing |
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