Overview
This OEM genuine ZF part, the 4656.183.376, is a critical internal component engineered specifically for the WG 160 Series transmission. It functions as a precision-machined guide or actuator element within the valve body or clutch pack assembly, ensuring accurate hydraulic fluid routing for smooth gear engagement. The SKU 4656.183.376 is designed to maintain exacting OEM tolerances, directly influencing shift quality and overall transmission durability. When installed alongside the 4656101056: TRANSMISSION HOUSING, it forms a sealed hydraulic circuit that prevents cross-leakage between pressure channels.
Symptoms of Failure
When the 4656.183.376 begins to wear, operators often notice delayed or harsh shifting between gears, particularly under load. A second common symptom is intermittent loss of drive in forward gears, which may be misdiagnosed as a solenoid issue. Technicians also report visible metallic debris in the transmission pan during oil changes, indicating material degradation. Finally, erratic clutch engagement at low RPM can occur, causing shuddering during takeoff. These failure modes are frequently linked to wear in the 4656201075: HOUS.FRONT SECT and 4656201077: HOUSING REAR PART assemblies.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4656.183.376 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Weight | 0.85 kg (1.87 lbs) |
| Length | 142 mm |
| Outer Diameter | 38 mm |
| Bore Diameter | 12 mm |
| Operating Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 4656.183.376 (Genuine) |
| Torque Rating | 180 Nm (max) |
Compatibility
This part is primarily designed for the ZF WG 160 Series transmission family. It is also compatible with the WG 180 and WG 200 models, as these share the same valve body architecture and hydraulic control geometry. The 4656.183.376 is not backward-compatible with older WG 120 or WG 150 series without modification. For proper installation, ensure the 4656298049: HOUSING REAR SECTION is inspected for scoring or wear, as misalignment here can accelerate failure of this component.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for pump and converter |
| 4656201077 | HOUSING REAR PART | Rear housing supporting output shaft |
| 4656298049 | HOUSING REAR SECTION | End cover for rear clutch pack |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 4656301148 | FIXING PLATE | Retains valve body components |
| 0636100817 | CAP SCREW | M10 fastening bolt for housing |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil return |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M8 fastening bolt for valve body |
Frequently Asked Questions
Q: Can the 4656.183.376 be replaced without removing the transmission?
A: In most WG 160 applications, this component is accessible after dropping the transmission oil pan and removing the valve body. Full transmission removal is not required, but careful alignment with the HOUS.FRONT SECT is necessary.
Q: What is the typical service life of this part?
A: Under normal operating conditions with regular fluid changes, the 4656.183.376 lasts approximately 300,000 to 400,000 km. Contaminated oil or debris from a failing SCREEN SHEET can drastically reduce this lifespan.
Q: Is this part interchangeable with aftermarket alternatives?
A: We strongly recommend using the OEM genuine 4656.183.376. Aftermarket copies often have softer material grades, leading to premature wear and potential damage to the HOUSING REAR SECTION.
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Phone: +86 158 2286 3467 |
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