Overview
This OEM genuine ZF 4656.056.140 is a precision-engineered component designed specifically for the WG 160 series transmission. It functions as a critical internal guide and support element within the gear train assembly, ensuring correct alignment and load distribution during operation. The SKU 4656.056.140 is manufactured to ZF’s original factory tolerances, making it the direct replacement for worn units in heavy-duty commercial vehicle transmissions. When installed alongside the TRANSMISSION HOUSING (4656101056) and the HOUS.FRONT SECT (4656201075), this part completes the structural integrity of the main gear case.
Symptoms of Failure
- Oil seepage around the rear bearing bore: When the 4656.056.140 wears, it can cause “ZF WG160 rear seal oil leak” as the sealing surface degrades, leading to visible drips under the bell housing.
- Gear engagement noise under load: A worn part results in “transmission whining noise when accelerating” due to increased axial play in the countershaft assembly.
- Hard shifting between gears: Operators may experience “difficulty shifting into 3rd gear WG160” as the component fails to maintain proper synchronizer alignment.
- Vibration at highway speeds: Excessive wear produces “transmission vibration at 60 mph” caused by uneven rotational forces transmitted through the housing.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.056.140 |
| Material | High-strength alloy steel (case-hardened) |
| Weight | 2.85 kg (6.28 lbs) |
| Outer Diameter | 142 mm |
| Inner Diameter | 68 mm |
| Length | 95 mm |
| Surface Treatment | Zinc-nickel plated (corrosion resistant) |
| OEM Reference | ZF 4656.056.140 (OEM Genuine) |
Compatibility
This part is primarily engineered for the ZF WG 160 series, but it also fits select variants of the WG 180 and WG 200 transmissions used in heavy trucks and construction equipment. It is a direct replacement for the rear support bearing housing in models produced between 2008 and 2020. For proper installation, it must be paired with the HOUSING REAR PART (4656201077) and the HOUSING REAR SECTION (4656298049) to ensure correct sealing and alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural case for gear assembly |
| 4656201075 | HOUS.FRONT SECT | Front section of transmission housing |
| 4656201077 | HOUSING REAR PART | Rear housing component for bearing support |
| 4656298049 | HOUSING REAR SECTION | Complete rear section with seal bore |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 4656301148 | FIXING PLATE | Secures bearing in position |
| 0636100817 | CAP SCREW | Fastener for housing sections |
| 4656301016 | SCREEN SHEET | Filter screen for oil flow |
| 4656301017 | SCREEN SHEET | Secondary filter screen |
| 0636100803 | CAP SCREW | Mounting bolt for rear section |
Frequently Asked Questions
Q: How do I know if the 4656.056.140 is the correct part for my WG160?
A: Verify your transmission serial number and look for the OEM stamp on the original component. This part is specifically for WG160 models with a 142mm outer diameter bearing bore. If your unit uses a different bore size, you may need the WG180 variant.
Q: Can I install this part without replacing the housing sections?
A: It is strongly recommended to inspect and replace the HOUSING REAR PART (4656201077) simultaneously, as wear on one often damages the mating surface of the other. Reusing a worn housing can lead to premature failure of the new component.
Q: What torque specification should I use for the cap screws?
A: For the CAP SCREW (0636100817), use 85 Nm (62 ft-lbs) with thread locker applied. Always refer to the ZF service manual for your specific transmission model.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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