ZF 4646.304.018 RING GEAR CARRIER for WG250 | OEM Genuine Part

Overview

The ZF 4646.304.018 RING GEAR CARRIER is a critical load-bearing component within the WG250 series transmission. This OEM genuine part functions as the central hub that supports the ring gear assembly, ensuring precise gear alignment and torque transfer under heavy-duty conditions. Positioned directly within the planetary gear set, the ring gear carrier interfaces with the TRANSMISSION HOUSING and the HOUSING to maintain structural integrity during high-stress operations. The SKU 4646.304.018 is manufactured to ZF’s exacting tolerances, making it essential for maintaining OEM performance standards in commercial vehicle transmissions.

Symptoms of Failure

• Abnormal gear whining or grinding noises during acceleration or deceleration, often indicating carrier wear or bearing surface degradation within the planetary set.
• Intermittent gear slipping under load, particularly in lower ratios, caused by loss of carrier-to-ring gear engagement tolerance.
• Metallic debris in transmission fluid during routine oil changes, signaling spalling or cracking of the carrier’s hardened surfaces.
• Vibration through the driveline at specific RPM ranges, resulting from uneven load distribution across the carrier’s mounting points.

Technical Specifications

Compatibility

This ring gear carrier is specifically engineered for the ZF WG250 series transmission. Based on its design architecture and spline configuration, it is also compatible with the following ZF models: WG180, WG200, and WG240. The part integrates directly with the COVER assembly and the CONNECTING PART to form the complete planetary gear set. Always verify your transmission’s serial number against ZF’s official compatibility charts before installation.

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