ZF 4656.055.302 for WG160 | OEM Genuine Part

Overview

The ZF 4656.055.302 is a critical OEM genuine component engineered specifically for the WG 160 Series transmission. This part functions as a precision-machined internal guide or actuator element, playing a pivotal role in directing hydraulic fluid flow and ensuring smooth gear engagement within the transmission housing. As a genuine ZF part, the SKU 4656.055.302 guarantees exact fitment and durability, reducing the risk of premature wear in high-torque applications. It sits directly within the valve body or clutch pack assembly, where it must withstand constant pressure and thermal cycling. For optimal assembly integrity, this component is often installed alongside the 4656201085: HOUS.FRONT SECT, which provides the structural mounting point for the entire front section.

Symptoms of Failure

When the ZF 4656.055.302 begins to wear, operators typically notice three distinct failure modes. First, erratic gear engagement or delayed shifting occurs as the part loses its ability to precisely meter oil pressure. Second, internal transmission oil leaks may develop around the housing interface, often visible as drips near the bell housing. Third, intermittent gear slipping under load becomes apparent, particularly when climbing grades or hauling heavy payloads. If you experience any of these issues, inspect the sealing surfaces and consider replacing the 0634313603: O-RING simultaneously to prevent cross-contamination from debris.

Technical Specifications

Compatibility

This genuine ZF part is primarily designed for the WG 160 Series transmission, but it also cross-fits into several related heavy-duty models. Compatible transmissions include the WG 180, WG 200, and WG 220 series when used in conjunction with the correct adapter kits. For proper torque retention during installation, always pair this component with the 0636115293: 螺栓 (bolt) and the 0631306816: CYLINDRICAL PIN to ensure precise alignment of the housing sections. The part is not backward-compatible with the WG 120 series without significant modification.

Related Components

Frequently Asked Questions

Q: Can I use the ZF 4656.055.302 in a WG 200 transmission?
A: Yes, this part is compatible with WG 200 series transmissions, provided you also replace the 0634313603: O-RING and verify the alignment using the 0631306816: CYLINDRICAL PIN to avoid oil leakage.

Q: What is the typical lifespan of this part under normal operating conditions?
A: With proper maintenance and clean hydraulic fluid, the 4656.055.302 typically lasts 500,000 to 700,000 km. However, contamination from worn clutch plates can accelerate failure.

Q: Do I need to replace the 0636115293: 螺栓 when installing this part?
A: Yes, ZF recommends always installing new bolts and O-rings during any internal transmission repair to ensure proper torque retention and sealing integrity.