Overview
The ZF 4656.056.054 is a precision-engineered OEM genuine component specifically designed for the WG 160 Series transmission. This part serves as a critical sealing and alignment element within the transmission’s hydraulic control circuit, ensuring consistent oil pressure regulation and smooth gear engagement. As an integral part of the valve body assembly, the 4656.056.054 works in concert with the TRANSMISSION HOUSING to maintain structural integrity under high torque loads. The SKU 4656.056.054 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit without modification.
Symptoms of Failure
- Erratic shift timing or delayed engagement – When the 4656.056.054 wears, hydraulic pressure fluctuations cause unpredictable gear changes, especially during cold starts.
- Oil seepage around the valve body interface – A degraded seal leads to visible transmission fluid leaks near the bell housing, often mistaken for a pan gasket failure.
- Harsh or clunking shifts under load – Worn internal surfaces prevent proper damping, resulting in jarring transitions between forward and reverse gears.
- Intermittent loss of drive in high gear – As the part fatigues, the transmission may momentarily slip out of overdrive, triggering a limp-home mode.
Technical Specifications
| OEM Part Number | 4656.056.054 |
| Material | Hardened alloy steel with nitrile coating |
| Weight | 0.42 kg (0.93 lbs) |
| Outer Diameter | 58 mm |
| Inner Diameter | 32 mm |
| Height | 18 mm |
| Operating Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 4656.056.054 (Genuine) |
Compatibility
This part is engineered for the ZF WG 160 Series transmission family. It is also compatible with the WG 180, WG 200, and WG 210 models when used in conjunction with the correct HOUS.FRONT SECT and HOUSING REAR PART. For heavy-duty applications, pairing the 4656.056.054 with the HOUSING REAR PART (4472239178) ensures optimal alignment in extended wheelbase configurations. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101037 | TRANSMISSION HOUSING | Encloses gear train and supports bearing loads |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4656201035 | HOUSING REAR PART | Rear housing section for output shaft alignment |
| 4472239178 | HOUSING REAR PART | Alternate rear housing for extended gear sets |
| 0631306816 | CYLINDRICAL PIN | Locates and aligns housing sections during assembly |
| 4656301148 | FIXING PLATE | Secures valve body components against vibration |
| 0636100817 | CAP SCREW | Fastens housing flanges with precise torque retention |
| 4656301016 | SCREEN SHEET | Filters debris from hydraulic fluid flow |
| 4656301017 | SCREEN SHEET | Secondary filtration for high-pressure circuits |
| 0636100803 | CAP SCREW | M8 fastener for securing auxiliary brackets |
Frequently Asked Questions
Q: Can the 4656.056.054 be reused after a transmission overhaul?
No. This is a wear-critical component that should always be replaced with a new OEM part during any rebuild to prevent premature hydraulic failure.
Q: Does this part require special tools for installation?
Yes. A calibrated torque wrench and a seal driver are recommended to avoid distorting the sealing surfaces. Always reference the ZF service manual for your specific WG 160 variant.
Q: How does the 4656.056.054 differ from aftermarket copies?
Genuine ZF parts use proprietary steel alloys and surface treatments that aftermarket parts often lack, leading to shorter service life and potential contamination of the transmission fluid.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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