ZF 4644.306.546 THREADED BUSH for WG65 | OEM Genuine Part

Overview

The ZF 4644.306.546 THREADED BUSH is a precision-engineered component designed specifically for the WG 65 Series transmission. This OEM genuine part functions as a critical interface point within the gearbox housing, providing a durable threaded seat for securing hydraulic lines or sensor assemblies. The SKU 4644.306.546 is manufactured to exact ZF tolerances, ensuring a leak-proof seal and maintaining proper oil pressure within the transmission system. It is typically installed directly into the TRANSMISSION HOUSING and works in conjunction with the HEXAGON SCREW to anchor adjacent assemblies.

Symptoms of Failure

When the ZF 4644.306.546 threaded bush wears out, operators often notice distinct performance issues. Look for these specific failure symptoms:

• Oil seepage around the WG65 housing: A degraded bush allows transmission fluid to escape, leaving visible wet spots near the threaded port.
• Loose or vibrating sensor mounts: If the bush threads strip, attached components will wobble, causing erratic shift patterns or warning lights.
• Hard shifting or gear slippage under load: A compromised seal reduces hydraulic pressure, leading to delayed engagement in forward or reverse gears.
• Metallic debris in the oil pan: Worn bush material can shed particles, contaminating the fluid and accelerating wear on other internals.

Technical Specifications

Compatibility

This threaded bush is primarily designed for the ZF WG65 transmission series, but it also fits select models within the broader WG family. Compatible transmissions include:

• ZF WG65
• ZF WG80 (with adapter housing)
• ZF WG120 (limited applications)
• ZF WG180 (when used with HOUSING part 4616301307)
• ZF WG200 (when paired with HOUSING part 4616301309)

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