ZF 0630.501.302 RETAINING RING for WG200/WG92 | OEM Genuine Part

Overview

The ZF 0630.501.302 RETAINING RING is a precision-engineered OEM component designed to secure internal assemblies within the WG200 and WG92 series transmissions. This snap ring functions as a critical axial locking mechanism, preventing shaft-mounted components such as gears, bearings, and clutches from shifting under load. Installed within the transmission housing, the 0630.501.302 ensures that the planetary gear sets remain properly seated during high-torque operations. As a genuine ZF part, this retaining ring meets exact factory tolerances to maintain drivetrain integrity. When paired with a properly sealed 4660101011: TRANSMISSION HOUSING, this component helps maintain consistent gear alignment across the entire service life of the unit.

Symptoms of Failure

• Transmission oil leaks near the output shaft: A worn or fatigued retaining ring can allow the bearing assembly to shift, breaking the seal between the shaft and the 4660301018: HOUSING, leading to fluid seepage.
• Intermittent gear slipping under load: When the ring loses its spring tension, planetary gears may drift out of alignment, causing momentary loss of power transfer during acceleration.
• Unusual metallic rattling from the transmission sump: A fractured retaining ring can dislodge and rattle inside the case, often accompanied by debris in the oil pan.
• Difficulty engaging range shifts: Misalignment caused by a failed ring can interfere with the 0501209818: RANGE SELECTOR mechanism, resulting in hard or delayed shifts between forward and reverse.

Technical Specifications

Compatibility

This retaining ring is engineered for the ZF WG200 and WG92 series transmissions, which are commonly used in medium-duty trucks, buses, and off-highway equipment. It is also compatible with the WG94 and WG98 series models that share the same planetary carrier design. The 0630.501.302 ring directly supports the output shaft bearing pack and works in conjunction with the 4660198001: PERIPHERALS assembly to maintain proper gear mesh. For applications requiring a full housing reseal, verify the condition of the 4660101011: TRANSMISSION HOUSING and the 4660301018: HOUSING to prevent future failures.

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