ZF 4656.055.304 for WG160 | OEM Genuine Part

Overview

The ZF 4656.055.304 is a critical OEM genuine component engineered specifically for the WG 160 Series transmission. This precision-machined part functions as a load-bearing interface within the gear train assembly, ensuring correct alignment and torque distribution during high-stress operations. As an original equipment manufacturer (OEM) part, the SKU 4656.055.304 guarantees exact fitment and material integrity, eliminating the risks associated with aftermarket substitutes. It is typically positioned between the main housing and the planetary carrier, where it absorbs axial loads and maintains gear mesh accuracy under heavy-duty cycles.

Symptoms of Failure

• Oil seepage around the bell housing: When the ZF 4656.055.304 wears, internal pressure can force transmission fluid past seals, leaving visible drips or wet patches on the casing.
• Intermittent gear slipping under load: A degraded part causes misalignment in the WG 160 gear train, leading to momentary loss of drive torque during acceleration or climbing.
• Metallic grinding noise during shifting: Worn contact surfaces produce a distinct high-pitched grinding sound, particularly when transitioning between forward and reverse gears.
• Increased vibration at highway speeds: Loss of dimensional stability in this component introduces harmonic imbalance, felt as a persistent shudder through the chassis.

Technical Specifications

Compatibility

This OEM genuine part is primarily designed for the ZF WG 160 Series transmission, but it also shares dimensional compatibility with the WG 180 and WG 200 models due to common housing architecture. It is frequently used in municipal buses, medium-duty trucks, and construction loaders equipped with ZF’s 6-speed powershift gearboxes. Always verify the part number 4656.055.304 against your transmission’s serial plate before installation. For complete assembly integrity, this component must be paired with the 4656201085: HOUS.FRONT SECT and secured using the 0636100817: CAP SCREW to prevent axial play. Additionally, the 0631306816: CYLINDRICAL PIN ensures precise alignment during reassembly, while the 4656301148: FIXING PLATE locks the assembly in position.

Related Components

Frequently Asked Questions

Q: Can the ZF 4656.055.304 be installed without replacing the fixing plate?
A: While possible, it is strongly recommended to replace the 4656301148: FIXING PLATE simultaneously, as wear on the plate can cause premature failure of the new component.

Q: What is the typical service life of this part in a WG 160 transmission?
A: Under normal operating conditions with regular oil changes, the OEM genuine 4656.055.304 typically lasts 8,000–12,000 hours before requiring inspection.

Q: Does this part require special tools for installation?
A: Yes, a hydraulic press and a torque wrench calibrated to 85 Nm are needed. The 0631306816: CYLINDRICAL PIN must be driven in with a brass drift to avoid surface damage.