ZF 4616.305.072 RING for WG65 | OEM Genuine Part

Overview

The ZF 4616.305.072 RING is a precision-engineered internal component specifically designed for the WG65 series of heavy-duty transmissions. This OEM genuine part functions as a critical sealing and spacing element within the planetary gearset assembly, ensuring correct axial clearance and preventing fluid bypass between rotating and stationary components. The SKU 4616.305.072 is manufactured to ZF’s exacting tolerances, making it essential for maintaining hydraulic pressure integrity and gear alignment during high-torque operations. When installed alongside the TRANSMISSION HOUSING, this ring contributes directly to the structural stability of the entire gear train.

Symptoms of Failure

• Hydraulic pressure loss during gear engagement: A worn 4616.305.072 ring allows pressurized oil to escape, causing delayed shifts or “slipping” under load. This is a common search query for “ZF WG65 transmission slipping under load.”
• Visible oil leaks around the bell housing area: When the ring loses its sealing profile, transmission fluid may seep past the housing interface, often misdiagnosed as a main seal failure. Technicians searching for “ZF transmission oil leak between housing and gearset” frequently encounter this symptom.
• Abnormal metallic grinding noises during deceleration: As the ring wears thin, metal-to-metal contact occurs between the gearset and the housing, producing a distinct grinding sound. This is a classic indicator for “ZF WG65 grinding noise when slowing down.”
• Intermittent neutral drop-out in high gear: Loss of axial preload from a degraded ring can cause the clutch pack to momentarily disengage, a symptom often searched as “ZF transmission drops out of gear intermittently.”

Technical Specifications

Compatibility

This ring is engineered for the ZF WG65 transmission series, which includes models such as the WG65, WG80, WG120, WG150, WG180, and WG200. It is specifically used in the planetary carrier assembly where it interfaces with the HEXAGON SCREW (M10x1.5×30) and the HEXAGON SCREW (M12x1.75×40) for secure mounting. Additionally, the HEXAGON SCREW (M16x2.0x50) is used in adjacent flange connections. Always verify your transmission serial number against ZF’s parts catalog before ordering.

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