Overview
The ZF 4657.330.031 Converter Bell is a critical structural component that houses the torque converter assembly within the WG160, WG190, and WG210 transmission series. This OEM genuine part, identified by SKU 4657.330.031, serves as the precise interface between the transmission housing and the engine flywheel housing, ensuring correct alignment of the converter pump and turbine assembly. As a load-bearing bell housing, it absorbs torsional vibrations and maintains concentricity between the engine crankshaft and transmission input shaft. This part is engineered from high-strength cast alloy to withstand the thermal expansion and mechanical stress inherent in heavy-duty industrial applications.
Symptoms of Failure
When the ZF 4657.330.031 Converter Bell begins to wear or sustain damage, operators typically notice oil seepage at the bell housing seam, often mistaken for a rear main seal leak. Another common failure indicator is abnormal gear engagement noise during acceleration, caused by misalignment of the torque converter within the bell. You may also experience intermittent transmission slipping under load, particularly when the converter bell develops hairline cracks that allow flexing. Finally, vibration through the chassis during converter lock-up suggests the bell’s mounting flange has warped, compromising the entire drivetrain alignment.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4657.330.031 |
| Material | High-grade cast aluminum alloy (A356-T6) |
| Weight | 12.4 kg (27.3 lbs) |
| Outer Diameter | 410 mm (16.14 in) |
| Bolt Hole Pattern | 6-hole, 180 mm PCD |
| OEM Reference | ZF 4657.330.031 (Genuine) |
| Surface Treatment | Corrosion-resistant anodized coating |
Compatibility
This converter bell is specifically engineered for the ZF WG160, WG190, and WG210 series transmissions. It is also compatible with the WG180 and WG200 models when used with the appropriate TRANSMISSION HOUSING (part 4656101056). For proper assembly, this bell interfaces directly with the HOUS.FRONT SECT (4656201075) and the HOUSING REAR PART (4656201077). In certain WG210 configurations, it also mates with the HOUSING REAR SECTION (4656298049). Always verify your transmission model suffix before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for clutch packs |
| 4656201077 | HOUSING REAR PART | Rear housing section for output shaft |
| 4656298049 | HOUSING REAR SECTION | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for bell housing |
| 4656301148 | FIXING PLATE | Secures converter bell to housing |
| 0636100817 | CAP SCREW | M12 bolt for bell housing fastening |
| 4656301016 | SCREEN SHEET | Filter screen for oil return gallery |
| 4656301017 | SCREEN SHEET | Secondary filter screen variant |
| 0636100803 | CAP SCREW | M10 bolt for accessory mounting |
Frequently Asked Questions
Q: Can I reuse the old gasket when installing a new 4657.330.031 converter bell?
A: No. ZF recommends always replacing the gasket and all O-rings between the bell and the transmission housing. Reusing old seals is a leading cause of post-installation oil leaks.
Q: Will this converter bell fit a ZF WG180 transmission without modification?
A: Yes, but only if you also install the correct TRANSMISSION HOUSING (4656101056) to match the bell’s bolt pattern. The WG180 uses a different housing flange thickness.
Q: How do I identify a genuine ZF 4657.330.031 versus an aftermarket copy?
A: Genuine parts have a laser-etched ZF logo and part number on the outer bell surface, along with a date code stamp. Aftermarket copies often omit these markings or use painted-on numbers that wear off quickly.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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