Overview
This OEM genuine ZF 4656.056.113 component is a critical internal actuation and sealing element specifically engineered for the WG 160 Series transmission. It functions as a precision-machined piston or valve assembly that modulates hydraulic pressure for clutch pack engagement and gear selection. The SKU 4656.056.113 sits within the valve body or clutch housing assembly, directly interfacing with the main control bore to ensure precise oil flow regulation. When this part degrades, the transmission loses its ability to maintain consistent hydraulic pressure, leading to delayed shifts and eventual mechanical distress.
Symptoms of Failure
- Delayed or harsh engagement when shifting from Neutral to Drive: A worn 4656.056.113 causes a noticeable lag or a jarring “clunk” as hydraulic pressure bleeds past the sealing surfaces.
- Intermittent gear slipping under load: If you experience the transmission “flaring” or losing power during acceleration on inclines, the internal sealing of this part has likely failed.
- Visible oil leaks around the transmission housing seam: A compromised 4656.056.113 can allow pressurized ATF to escape, leaving puddles under the bell housing or valve body cover.
- Erratic shift patterns in cold weather: When the hydraulic circuit cannot hold prime due to a worn actuation component, shifts become unpredictable until the transmission warms up.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4656.056.113 |
| Material | Hardened alloy steel with nitrile sealing surface |
| Outer Diameter | 38.5 mm |
| Length | 62.0 mm |
| Weight | 0.185 kg |
| OEM Reference | ZF WG 160 Series |
Compatibility
This genuine ZF 4656.056.113 is designed primarily for the WG 160 series transmission. It is also compatible with the WG 180 and WG 200 models that share the same hydraulic control architecture. The part is not interchangeable with older WG 120 or WG 150 variants due to differences in bore diameter and port alignment. Always verify the transmission serial number against the OEM parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101057 | TRANSMISSION HOUSING | Main structural casing that encloses all gear sets and hydraulic components |
| 4656201075 | HOUS.FRONT SECT | Front section housing that supports the torque converter and input shaft |
| 4656201078 | HOUSING REAR PART | Rear casing segment that houses the output shaft and parking mechanism |
| 4656298050 | HOUSING REAR SECTION | Intermediate rear housing that provides mounting points for the tail shaft |
| 0631306816 | CYLINDRICAL PIN | Precision alignment pin for doweling housing sections together |
| 4656301148 | FIXING PLATE | Retention plate that secures the valve body assembly to the housing |
| 0636100817 | CAP SCREW | High-tensile fastener for mounting the housing sections |
| 4656301016 | SCREEN SHEET | Fine mesh filter that protects the hydraulic circuit from debris |
| 4656301017 | SCREEN SHEET | Secondary filter screen for the low-pressure return circuit |
| 0636100803 | CAP SCREW | Fastener for securing the screen sheet and filter assembly |
Frequently Asked Questions
Q: Can I install the 4656.056.113 without replacing the surrounding housing seals?
A: It is strongly recommended to replace the TRANSMISSION HOUSING gaskets and the CYLINDRICAL PIN simultaneously. Contaminated or worn alignment pins can cause premature wear on the new actuation component.
Q: How do I verify that the 4656.056.113 is the correct part for my WG 160 transmission?
A: Check the stamped serial number on the transmission data plate. The WG 160 series will have a prefix of “WG160” followed by a six-digit build number. This part is not backward-compatible with WG 150 units.
Q: What torque specification should I use for the CAP SCREW when securing the housing?
A: Use 45 Nm for the M8 cap screws and 85 Nm for the M10 fasteners. Always apply thread locker to prevent loosening from vibration.
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Phone: +86 158 2286 3467 |
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