Overview
The ZF 4656.056.030 is a critical OEM genuine component engineered specifically for the WG 160 Series transmission. This part functions as a precision-machined guide or actuation element within the valve body or clutch housing assembly, ensuring precise hydraulic flow and gear engagement. The SKU 4656.056.030 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty commercial and industrial drivelines. It integrates seamlessly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to maintain structural integrity under high torque loads.
Symptoms of Failure
- Delayed or harsh gear engagement: When the 4656.056.030 wears, hydraulic pressure drops, causing noticeable lag when shifting from neutral to drive or reverse.
- Intermittent transmission slipping: Worn surfaces prevent proper valve seating, leading to random power loss under load—a common long-tail search query for “ZF WG160 slipping under acceleration.”
- External oil seepage near the housing joint: Degraded sealing surfaces allow ATF to escape, often misdiagnosed as a gasket failure. This part works in concert with the HOUSING REAR PART and the HOUSING REAR PART to contain fluid pressure.
- Erratic shift patterns: A failing component causes the transmission to hunt between gears, particularly in stop-and-go applications.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4656.056.030 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.45 kg (approx.) |
| Dimensions (L x W x H) | 85 mm x 32 mm x 28 mm |
| Surface Finish | Ground and polished to Ra 0.4 µm |
| OEM Reference | ZF WG 160 Series |
Compatibility
This genuine ZF 4656.056.030 part is designed primarily for the WG 160 Series transmission. It is also compatible with select variants in the WG 180 and WG 200 families that share the same valve body architecture. Always verify your transmission model code before ordering. The component interfaces directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to ensure correct alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101038 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201037 | HOUSING REAR PART | Rear housing section for output support |
| 4472239180 | HOUSING REAR PART | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 4656301148 | FIXING PLATE | Secures valve body components |
| 0636100817 | CAP SCREW | High-tensile fastener for housing |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4656301017 | SCREEN SHEET | Alternate mesh filter specification |
| 0636100803 | CAP SCREW | Standard fastener for cover plates |
Frequently Asked Questions
Q: Can the 4656.056.030 be installed without replacing the HOUSING REAR PART?
A: Yes, but we recommend inspecting both the housing and the HOUS.FRONT SECT for wear, as misalignment can accelerate failure of the new component.
Q: How do I confirm this part fits my WG 160 transmission?
A: Verify your transmission serial number and compare it against the WG 160 series parts list. The 4656.056.030 is specific to valve body assemblies that use the TRANSMISSION HOUSING with a 6-bolt pattern.
Q: What is the typical lifespan of this OEM part?
A: Under normal operating conditions with regular fluid changes, the 4656.056.030 lasts 300,000–500,000 km. Harsh duty cycles or contamination can reduce this significantly.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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