ZF 0730.501.818 RETAINING RING for WG94 | OEM Genuine Part

Overview

The ZF 0730.501.818 RETAINING RING is a precision-engineered axial locking component designed specifically for the WG 94 series of powershift transmissions. This OEM genuine part secures internal assemblies—such as gear clusters and bearing packs—against axial displacement under high torque loads. The SKU 0730.501.818 corresponds to a snap ring that fits into a machined groove on the output shaft or planetary carrier, preventing lateral movement that could lead to gear misalignment. Without this retaining ring, the entire rotating assembly can shift, causing catastrophic contact between rotating and stationary components. It is a critical safety element in the drivetrain, often replaced during a full overhaul alongside the 4661101037: TRANSMISSION HOUSING and 4661301099: HOUSING II to ensure proper clearance and load distribution.

Symptoms of Failure

• Axial play or end float in the output shaft – A worn or broken retaining ring allows the shaft to move back and forth, producing a distinct clunking noise during acceleration or deceleration. This is a common search query for “ZF WG94 output shaft play.”
• Intermittent gear slipping under load – When the ring fails, gear clusters lose their fixed position, causing the transmission to momentarily lose torque transfer. Technicians often search for “WG94 gear slipping retaining ring.”
• Metal debris in the oil pan – A fractured retaining ring sheds hardened steel fragments into the lubrication circuit. This symptom is frequently queried as “ZF transmission metal shavings snap ring.”
• Oil leaks from the output seal area – Axial movement of the shaft damages the lip seal, leading to external fluid loss. This is a long-tail search for “WG200 transmission oil leak retaining ring.”

Technical Specifications

Compatibility

This retaining ring is engineered for the ZF WG 94 transmission family, which includes the WG94, WG120, WG150, WG180, and WG200 models. It is commonly used in the planetary gearset retention system. When replacing this ring, always inspect the mating groove in the 4661301099: HOUSING II for wear or burrs. Additionally, the 0631306174: CYLINDRICAL PIN and 0769123894: TYPE PLATE are often replaced concurrently during a full rebuild to ensure all locating features are within tolerance.

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