ZF 4644.306.548 GEAR SHIFT HOUSING for WG200/WG201/WG250 | OEM Genuine Part

Overview

The ZF 4644.306.548 GEAR SHIFT HOUSING is a precision-machined component that serves as the primary interface for gear selection within the WG200, WG201, and WG250 series transmissions. This OEM genuine part encloses the shift forks and selector mechanisms, ensuring precise alignment during gear changes. The SKU 4644.306.548 mounts directly onto the main TRANSMISSION HOUSING (4644101175) and works in tandem with the TRANSMISSION HOUSING (4644301221) to create a sealed environment for internal shift components. Its robust construction withstands high cyclic loads and thermal expansion in heavy-duty commercial applications.

Symptoms of Failure

• External oil seepage around shift tower: A cracked or warped gear shift housing allows transmission fluid to escape, often visible as wet spots near the shift linkage.
• Gear engagement hesitation or grinding: Worn bearing surfaces inside the housing cause misalignment of shift forks, leading to delayed or rough gear changes.
• Excessive shift lever play: Degraded pivot points within the housing create sloppy movement, making it difficult to find gears consistently.
• Metallic debris in transmission fluid: Internal fracturing of the housing can shed aluminum particles, contaminating the oil and accelerating wear on other components.

Technical Specifications

Compatibility

This gear shift housing is engineered for ZF WG-series transmissions, specifically the WG180, WG200, WG201, and WG250 models. It is a direct replacement for original equipment in both on-highway trucks and off-highway machinery. The housing interfaces with the TYPE PLATE (0730365067) for identification and is secured using GROOVED STUD (0631311009) fasteners. Always verify your transmission serial number before ordering.

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