Overview
The ZF 4656.174.046 is a critical OEM genuine component engineered specifically for the WG 158 Series transmission. This part functions as a precision-machined guide or spacer element within the hydraulic control assembly, ensuring correct oil flow and pressure regulation during gear shifts. The SKU 4656.174.046 sits directly in the valve body or clutch pack area, where it maintains alignment and prevents cross-leakage between circuits. When paired with the 4656201016: HOUS.FRONT SECT and the 4656301142: OIL TUBE, this part forms a sealed oil delivery pathway essential for consistent transmission performance.
Symptoms of Failure
- Delayed or harsh shifting – When the 4656.174.046 wears, internal oil pressure drops, causing hesitation between gears or abrupt engagement.
- Transmission fluid leaks near the valve body – A worn sealing surface on this OEM genuine part allows ATF to seep past, leaving puddles under the bell housing.
- Erratic clutch engagement – Loss of hydraulic alignment leads to partial clutch pack application, resulting in shuddering during acceleration.
- Overheating under load – Insufficient oil circulation due to a degraded 4656.174.046 forces the transmission to run hotter than normal, especially in heavy-duty applications.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4656.174.046 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Weight | 0.28 kg (0.62 lbs) |
| Outer Diameter | 38.5 mm |
| Inner Diameter | 18.2 mm |
| Height | 24.7 mm |
| OEM Reference | ZF 4656.174.046 (Genuine) |
Compatibility
This OEM genuine part is primarily designed for the ZF WG 158 Series transmission. It also fits select variants of the WG180 and WG200 models where the hydraulic control assembly shares identical bore dimensions. Always verify your transmission model tag before ordering. The 4656.174.046 works in concert with the 0631306816: CYLINDRICAL PIN and the 4656301148: FIXING PLATE to secure the oil tube assembly in place.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656201016 | HOUS.FRONT SECT | Front housing section that encloses the clutch pack |
| 4656301142 | OIL TUBE | Routes pressurized fluid to the valve body |
| 0631306816 | CYLINDRICAL PIN | Aligns and locks the oil tube in position |
| 4656301148 | FIXING PLATE | Secures the oil tube to the housing |
| 0636102489 | CAP SCREW | Fastens the fixing plate to the transmission case |
| 4656301016 | SCREEN SHEET | Fine mesh filter for the oil intake circuit |
| 4656301017 | SCREEN SHEET | Secondary mesh filter for return oil flow |
| 0636100803 | CAP SCREW | Mounting bolt for the front housing section |
| 0750301003 | OIL FEED.HOUSG. | Housing that directs oil from the pump to the valve body |
| 0736300233 | TORX SCREW | High-torque fastener for the oil feed housing |
Frequently Asked Questions
Q: Can I use the 4656.174.046 in a WG180 transmission?
A: Yes, this OEM genuine part is compatible with WG180 models that share the same hydraulic bore dimensions as the WG158. Always cross-reference your transmission serial number.
Q: What tools are needed to replace this part?
A: Replacement requires a standard socket set, a torque wrench, and a seal installer. We recommend replacing the 4656301142: OIL TUBE simultaneously to prevent future leaks.
Q: How do I confirm this is the correct part for my ZF unit?
A: Locate the transmission model tag on the bell housing. If it reads WG158, WG180, or WG200, the 4656.174.046 is likely correct. Measure the outer diameter (38.5 mm) to verify fitment.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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