ZF 4616.303.167 RING for WG65 | OEM Genuine Part

Overview

The ZF 4616.303.167 RING is a precision-engineered internal component designed specifically for the WG65 series of heavy-duty transmissions. This OEM genuine part functions as a critical sealing and spacing element within the planetary gear set, ensuring correct axial clearance and preventing pressurized oil from bypassing lubrication channels. The SKU 4616.303.167 is manufactured to ZF’s exacting tolerances, making it essential for maintaining hydraulic integrity during high-torque operations. When installed alongside a TRANSMISSION HOUSING, this ring helps maintain the structural alignment of rotating assemblies.

Symptoms of Failure

• Internal oil pressure loss and sluggish shifting: A worn 4616.303.167 ring allows transmission fluid to bypass the intended circuit, resulting in delayed gear engagement and soft shifts during acceleration.
• Audible whining or grinding from the transmission bell housing: When this ring loses its dimensional integrity, metal-to-metal contact occurs between the drum and housing, producing a distinct high-pitched noise under load.
• Visible fluid seepage around the WG65 case seam: Degraded ring material can cause external oil weeping near the joint where the ring seats, often mistaken for a gasket failure.
• Overheating transmission with burnt fluid odor: Insufficient sealing from a failed ring reduces lubrication flow, leading to elevated operating temperatures and accelerated fluid breakdown.

Technical Specifications

Compatibility

This ring is engineered for the ZF WG65 series, which includes the WG65, WG80, and WG90 models commonly found in municipal trucks, fire apparatus, and heavy construction vehicles. While the 4616.303.167 is dimensionally specific to the WG65 planetary carrier, it may also be used in select WG120 and WG180 transmissions where the same snap-ring groove geometry is present. Always verify fitment by cross-referencing the original part number. For secure installation, pair this ring with HEXAGON SCREW fasteners and HEXAGON SCREW bolts to ensure proper clamping force on the housing assembly.

Related Components

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